(单选题)23: Nowadays consumers become more and more practical and buy only _______ they need. A: where B: which C: when D: what ...

(单选题)12: No one enjoys _______ at. A: laughing B: to laugh C: being laughed D: to be laughed ...

(单选题)6: While _______ the sun, the satellite has sent more than four billion bits of information back to earth. A: having orbited B: being orbited C: having been orbited D: orbiting ...

(单选题)25: _______ in a recent science competition, the three students were awarded scholarships totaling $21,000. A: Judged the best B: To be judged the best C: Judging the best D: Having judged the best ...

(单选题)14: I don't like ______ as you read. A: the novels B: the such novels C: such novels D: same novels ...

(单选题)21: How soon do you expect() for American? A: be leaving B: will leave C: to leave D: going to leave ...

(单选题)15: She felt anxious about her son as she ________for quite a long time. A: haven't heard him B: hadn’t heard him C: haven‘t heard from him D: hadn’t heard from him ...

(单选题)9: It's very( ) of you not to talk aloud while the baby is asleep. A: considering B: considerate C: careful D: consideration ...

(单选题)3: _______ his mother, the baby could not help _______. A: To see；to laugh B: Seeing；to laugh C: Seeing；laughing D: To see；laughing ...

(单选题)22: Homework _______ on time will lead to better grades. A: done B: be done C: having done D: to have been done ...