Choose the best answer from the four options given (A, B, C, or D) to complete each sentence. 

_______he arrives at the airport in the next ten minutes, Mr. Santini is going to have to take a later flight.

I believe nobody survived the plane crash ...............

I am going to the dentist’s tomorrow. I hope I don’t need to .............

Never before  .............  as accelerated as they are now during the technological age.

Choose the best answer from the four options given (A, B, C, or D) to complete each sentence. 

To learn more about safe ways to control garden pests using _____________household chemicals, visit our Web site.

In _______ most countries, it is compulsory for children to receive primary education.

It was not until the students  were seated .............  the proctor realized he had the wrong test booklets.

Nam: “Would you like to join us for dinner after work?” - Lan: “  .....................   .”

Portuguese _______ as an official language in this city since three hundred years ago.

Hai: “I've seen John at the workshop on communication skills.” Phong: “  .................   .”

Centuries of erosion have exposed.............rock surfaces in the Painted Desert of northern Arizona

I hear they are going to _______ the old cinema and build a supermarket.

The…….. of his first novel appeared in The Times yesterday. 

I _________tired. Let's find somewhere to have a rest. 

 Your record is scratched and . . . is, too. 

Laura: “Remember to phone me when you arrive at the airport.”

Annie: “  ..............   .”

Anne is talking to John when he visits her home. Anne: “Make yourself at home.”

John: “  ...............   ”

 Mary: “Can I have some more meat?” John: “____________.” 

How to protect children web fans from unsuitable material online while (1) ________ them to use the Internet has long been discussed in the U.S.
For some parents, the Internet can seem like a jungle, filled with danger for their children. But jungles contain wonders as well as hazard and with good guides, some education, and a few precautions, the wilds of the Internet can be safely (2) ________. "Kids have to be online. If we tell our kids they can't (3) ________ the Internet, we're cutting them off from their future," said an expert. 
Most kids have started to use search engines. Many of them are great for finding tons of interesting Internet sites, and they can also (4) ________ places where you might not want your kids to go. There are search engines (5) ________ just for kids. A certain software contains only sites that have been selected as safe. The most popular way to limit access would be to use what is known as a "content screener". But this can't be wholly (6)________, and the best thing parents can do is to talk to their kids and let them know what is OK or not OK to see or do on the Internet. Another way is that mum or dad is nearby when the child is surfing the Internet. 
A few other tips: - Don't put the PC in a child's room but keep it in an area where mum or dad can keep (7)________ things. That also makes the Internet more of a family activity.
- Ask your child (8) ________ he or she has been doing and about any friends they make online.
- Tell your child not to give on-line strangers (9) ________ information, especially like address and phone number.
- And tell your children never to talk to anyone they meet online over the phone, send them anything, accept anything from them or agree to meet with them (10) ________ you go along.
(1)............................

Choose the correct answer

He succeeded________ getting a scholarship.

_______ is the study of the Earth's physical features and the people, plants, and animals that live in different regions of the world.