(单选题)17: Although I had been invited to the opening ceremony, I was unable to attend（ ）such short notice. A: to B: in C: with D: on ...

(单选题)11: Mary is always _______ when she doesn’t get any mail. A: affected B: dissed C: plain D: disturbed ...

(单选题)5: That rich man has been dead for a long time but his ________ is still not known to the public. A: sausage B: shelf C: portion D: will ...

(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)43: This knife is made of steel（ ）and it can be used for a long time. A: mixed B: alloy C: champion D: grasp ...

(单选题)37: He designed an experiment in order to（ ）his theory. A: demonstrate B: proof C: defense D: grasp ...

(单选题)31: This is a（ ）moment for our research. We should be careful. A: critical B: belt C: conscience D: copper ...

(单选题)25: What is your（ ）to his coming? A: altitude B: attitude C: attribute D: aspect ...

(单选题)19: When I read the newspaper, I always read the（ ）first. A: headlines B: headquarters C: heaven D: horizon ...

(单选题)13: In this kind of hotel, there are no（ ）rooms. A: luxury B: marvelous C: occasional D: sulphur ...