(单选题)15: The dog _______ the rabbit but could not catch it. A: ceased B: chained C: checked D: chased ...

(单选题)49: We need to（ ）experiments from their purpose. A: clarify B: cheek C: claim D: clap ...

(单选题)37: Even as（ ）, he made several wonderful inventions. A: a stock B: a representative C: an undergraduate D: a gulf ...

(单选题)31: Smoking is so harmful to personal health that it kills（ ）people each year than automobile accidents. A: seven more times B: seven times more C: over seven times D: seven times ...

(单选题)7: I（ ）you’ve decided against taking my advice. A: express B: declare C: assume D: exclude ...

(单选题)49: He _______ a lot of time in trying to develop the education system in this area. A: involved B: investigated C: invested D: interfered ...

(单选题)39: According to the recent research, heavy coffee drinking and heart attack are not necessarily ____ and effect． A: reason B: caution C: fact D: cause ...

(单选题)49: A:they _____students, aren’t they? B:Yes, they _____. A: are?all??,are?all B: all?are?,all?are C: are?all?,all?are D: all?are,?are?all ...

(单选题)43: .If　you　have　any　problems　during　your　study　here,　please　do　not　____　to　call　me　for　help. A: hesitate B: despair C: .urge D: request ...

(单选题)7: I have no（ ）but to listen to my boss. A: privilege B: respect C: priority D: option ...