Gold, silver, and copper coins are often alloyed whit harder metals to make them hard as enough to withstand wear.

Câu hỏi liên quan

• Drug abuse have become one of America’s the most serious social problems .

• David is talking to his friend, _    ?

• A smile can be observed, described, and reliably identify; it can also be elicited and manipulated under experimental conditions

ZUNIA12

• If his grades had been better, he would accept as a graduate student on the MBA program.

• Choose the correct answer to complete the sentence. "Deforestation is one of the biggest environmental______ the ecological balance in the world"

• The children can read the story, _    ?

• Gwendolyn Brooks, which won a Pulitzer Prize for Poetry in 1950, had 75 poems published by the time she was twenty.

• Choose the correct answer to complete the sentence. "Some scientists were _____ of having falsified the effects of climate change"

• He had so a difficult exercise that he couldn’t do it .

• It is the writing English that causes difficulties to foreigners

• The Texas Panhandle region, in the Northwestern part of the state, produces more wheat, cotton , and grain sorghum than any of other area of Texas.

• It is large island, few people live there, though.

• One of the four underlined parts marked A, B, C, D in each sentence is not correct in standard English. Identify them: 

  If drivers obeyed the speed limit, fewer accidents occur. 

• During his twelve year there, Ellsi Marsalis turned the New Orleans Center for the Creative Arts into a rich training place for future jazz stars.

• I would have gone with him to Washington except I had had no time

• I miss my old motorbike, I wish I ____ it. I had it for years. 

• Jill regrets having bought that second-hand laptop. She wishes she ______. 

• Some of plants in this store require very little care, but this one needs much more sunlight than those 

• You aren't doing your homework,  _    ?

• The intent of the Historical Society is to restore old buildings and the increase of interest in the history of the area.