(单选题)25: The flyover at the crossing on the 4th Ring Road is now ______ construction. A: under B: at C: in D: with ...

(单选题)19: How the fire in the dancing hall started _________ a mystery. A: to remain B: remains C: remain D: is remaining ...

(单选题)16: The little boy, Johnnie, had been up with a _____of mints. A: pack B: packed C: pocket D: package ...

(单选题)15: She _____the handkerchief and put it in her pocket. A: folded B: focused C: bent D: curved ...

(单选题)13: A voice _____ the program to announce the election results． A: broke into B: broke off C: cut down D: cut out ...

(单选题)11: The committee ______ over the problem among themselves for two hours. A: has argued B: has been arguing C: have argued D: have been arguing ...

(单选题)10: The paint is still wet. _____! A: Be not sure to touch it B: Be sure not to touch it C: Be sure to not touch it D: Don't be sure to touch it ...

(单选题)9: Some people viewed the findings with caution, nothing that a cause-and-effect relationship between passive smoking and cancer remains _____. A: to be shown B: to have shown C: to have been shown D: being shown ...

(单选题)7: If he_____of all the dangers, he should change his mind. A: knows B: be clear C: hears D: be aware ...

(单选题)3: We could do _____ wait for the instructor to arrive． A: nothing only B: nothing merely C: nothing but D: nothing just ...