Choose the best answer:
It’s a really difficult matter to decide how to solve now. I will need time to think it twice.

............. research team is an effective way to prepare for class preparation of social studies such as history, geography, literature and economics.

Unless we _____ the problem, many animals could become extinct.

If only I _    you wanted to invest money in business last year.

We appreciated  ........   more opportunities  ............  part in the story - telling contest.

It is very difficult to ................... the exact meaning of an idiom in a foreign language.

We have a suggestion to make. How _________ if we _________ you the job of assistant manager. 

Today the move away from rigid rules makes it much easier (1) ________ the right way to behave because there are fewer out and out ‘wrongs’. Of course there are still a few situations where inflexible rules (2) ________, although these are mainly concerned with official functions. But nine times out of ten, the way you choose to behave is (3) ________ you, with one very important proviso: that you keep firmly in (4)________ the basis (5)________ etiquette has grown up; in other words, the need always to consider other people's feelings first. 
Some people, for instance, are very informal and outgoing by (6) ________, while others prefer to be more reserved and formal. Younger people tend to be less formal than their parents. Habits can (7) ________ in different parts of the country. Behaviour which may be commonplace in the capital - like arriving later than the stated time - can often be unconventional (8) ________. Just remember the basic rule of consideration for others, and when in doubt, follow the example of those around you. Etiquette is a skill that is easily learned and it brings the benefits of other people's appreciation whenever you (9) ________ in practice. It's a pleasure to spend time with people who are reliably courteous and (10) ________; it's also pleasant to feel that you will always know what to do or say in any circumstances, mundane or extraordinary
(3).....................

Armed terrorists are reported to have _____ the Embassy.

Your car is quite old. It's the same as__________.

Mark the letter A, B, C or D to indicate the word or phrase that is OPPOSITE in meaning to the underlined part in each of the following questions.

Unless the two signatures arc identical, the bank won’t allow you to withdraw your money.

Every country has its (1) _________ traditions, some of which have existed for centuries. In my opinion, we should do everything possible to preserve them.
Some people think that in today's high-tech world traditional celebrations are too old-fashioned and (2) _________ to our lives. However, (3) _________ such as Carnival, are important, as they bring communities together and make us think about other people and not just computers. 
(4) _________ argument against traditional festivals is that they are expensive to organise. To some extent this is true, particularly when there are firework (5) _________ or parades. On the other hand, it is a small price to pay for brightening up our lives with entertainment and colour. (6) _________, celebrations like the 'Fallas' in my home town of Valencia (7) _________ many tourists and their money.
Finally, although I agree that some traditional customs (8) _________ their original significance, they can provide an opportunity for us to learn about our past. For example, Bonfire Night teaches British children about a particular period of their country's history.
To conclude, traditional celebrations are (9) _________ great pleasure and interest, and they are certainly (10) _________ keeping.
(4)...............

Identify the error in each sentence: They have so many children that they can’t afford sending them all to university

Identify the error in each sentence:  By reading the instructions carefully, (A) mistakes on the examination (B) can (C) be avoided (D)

Scientists ________ in their opinions of how snow crystals originate.

Identify the error in each sentence: 

The production of different kinds of artificial materials are essential to the conservation of our natural resources.

Choose the best answer among A, B, C or D that best completes each sentence: There was a record  …… of candidates for the post.

............ in astronomy, the discovery of Uranus was by accident.

This building ....................... finished by the end of last year but there have been so  many strikes that it isn’t finished yet.

Ms Nga prefers watching TV ______out.

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Everybody agrees that no more staff ________.