(单选题)7: _____ we got to the station, the train had left already. A: If B: Unless C: Since D: When ...

(单选题)1: Busy _____ he was, he tried his best to help you. A: as B: when C: since D: for ...

(单选题)20: In our factory there are 2,000 workers, two thirds of ____are women. A: them B: which C: whom D: who ...

(单选题)14: Information has been put forward __________ more middle school graduates will be admitted into universities. A: while B: that C: when D: as ...

(单选题)8: You _____ come earlier. The bus left a moment ago. A: would B: should have C: may D: have ...

(单选题)2: There’s a feeling in me ___________ we’ll never know what a UFO is. A: What B: which C: of which D: That ...

(单选题)15: The young trees we planted last week require _______ with great care. A: looking after B: to look after C: to be looked after D: taken good care of ...

(单选题)9: They insisted on _______ another chance to try. A: given B: giving C: being given D: to be given ...

(单选题)3: I’m afraid they would not allow him ________ here. A: to smoke B: smoking C: smokes D: smoke ...

(单选题)22: Must I take a bus? No, you _____. You can walk there. A: must not B: may not C: don’t have to D: had better not to ...