(单选题)40: In discussing environmental pollution we ought to keep ____ the point of concern. A: to B: at C: on D: off ...

(单选题)28: Twenty years ago it was common to see people _________ from hunger on the streets in that poor nation, but clearly the situation has improved greatly since then. A: calling B: preventing C: resulting D: collapsing ...

(单选题)22: This project money is intended ____ the Hope Project only. Nobody is allowed to make use of it for other purposes. A: for B: to C: toward D: with ...

(单选题)48: The line was engaged and the operator asked if I’d like to ____. A: hang about B: hang back C: hang on D: hang out ...

(单选题)42: The method he used turned out to be _______ in improving the students' English. A: effective B: able C: capable D: explicit ...

(单选题)36: Thousands of workers lost their ____ when the factory closed. A: work B: employment C: occupation D: jobs ...

(单选题)24: I got a little ________ when I learned that the appointment with the general manager was changed to another time. A: concerned B: distracted C: upset D: awful ...

(单选题)18: Mary could not tell Jane the secret with her little brother standing ____. A: by B: up C: in D: to ...

(单选题)50: The doctor gave her some medicine. After she took it, she didn’t ___ for two days. A: come out B: come off C: come about D: come to ...

(单选题)44: A Greek trading ship is making ____ the Panama Canal. A: up B: for C: out D: of ...