Due to severe weather condition, we had to wait long hours _______ the airport.

A. in B. at C. from D. on

The pair of jeans I bought for my son didn’t fit him, so I went to the store and asked for _______.

A. the other ones B. others ones C. another pair D. another

_______ through a telescope, Venus appears to go through changes in size and shape.

A. It has seen B. It is seen C. When seen D. Seeing

We intend to _______ with the old system as soon as we have developed a better one.

A. do in B. do down C. do up D. do away

The cosmopolitan flavor of San Francisco is enhanced by _______ shops and restaurants.

A. its many ethnic B. its ethnicity C. ethnicity D. an ethnic

 _______ here for hours and I feel tired

A. I had been standing B. I have been standing C. I have stood D. I’m standing

Caroline has worn her new yellow dress only once since she buys it.

    A. has worn B. yellow C. once D. buys

If you have some sufficient knowledge of English, you can make yourself understand almost everywhere.

    A. some B. of C. understand D. almost

It was suggested that Pedro studies the material more thoroughly before attempting to pass the exam.

    A. studies B. more C. attempting D. to pass

I should leave here. I don't want to ... my welcome.

A. give up

B. go off

C. run down

D. wear out