silk feels soft and cool, it's difficult to be taken good care of.
A. Because B. Though C. Since D. As
—Is David coming by train?
—He should, but he not. He likes driving his car.
A. can B. need C. must D. May
—The air pollution is terrible.
— It will be worse ________ we take action to protect the environment.
A. if B. unless C. until D. When
- Which of the two T-shirts would you like? - ________. I don't like their styles.
A. Either B. Both C. None D. Neither
— He hardly spent any time on his subjects, _________?
—_________, so he did badly in his lessons.
A. didn’t he; Yes B. did he; Yes
C. didn’t he; No D. did he; No
—The presidents of China and the USA had ________ interview a short time ago.
—And it was ________ great success.
A. an; / B. the; a C. an; a D. the; /
