Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following exchanges.

It is reported that humans are the main reason for most species decline, habitat ______ is the leading threat.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following exchanges.

I have just found the book _____

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following exchanges.

People should stop smoking ________ it is extremely detrimental to health.

Mark the letter A, B, C, or D on your answer sheer to indicate the underlined part that needs correction in each of the following questions.

We received a SOS signal appearing right here in this city, please connect the support team there immediately.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following exchanges.

The local authority demanded that new migrants __________ to settle down.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best completes the following exchanges.

We were having dinner in a restaurant last night when this guy at the next table _______ because the waiter brought the wrong thing.

Mark the letter A, B, C, or D on your answer sheer to indicate the underlined part that needs correction in each of the following questions.

To show the different ideas about love and marriage, a survey was conducted in American, Chinese and Indian students.