She came while I ________ my homework.

It is found that endangered species are often concentrated in areas that are poor and densely populated such as much of Asia and Africa.

A customer is talking to a shop assistant about the sweater he has chosen.

- Customer: “That's nice. Could I try it on?”

- Shop assistant: “________”

Mark the letter A, B, C, or D on your answer sheet to indicate the word whose underlined part differs from the other three in pronunciation in each of the following questions.

Mark the letter A, B, C, or D on your answer sheet to indicate the sentence that best combines each pair of sentences in the following questions.