11.The students laughed ______ the silly answers they had put on their tests.
A. at B. from C. to D. over
12.The bell rang and I hurriedly rushed into the classroom, knocking ______ our maths teacher.
A. at B. into C. off D. out
13.They differ ______ each other in many ways.
A. to B. with C. on D. from
14.The movie we saw last night was very different ______ the novel.
A. of B. to C. from D. as
15.Someone was speaking there; the voice was familiar ______ us.
A. by B to C. for D. with
16.Controlling a class of school pupils calls ______ all your skills as a teacher.
A. up B. off C. for D. on
17.When the taxi came I put out my hand, but it just went ______ me without stopping.
A. off B. over C. through D. past
18.I began to work here ______1978.
A. in B. at C. on D. since
19.______(在一个寒冷的冬日), George jumped into the lake and saved a little girl. [On a cold winter day]
20.It’s nice to go for a walk ______ a summer evening.
A. on B. at C. in D. during
答案：11.A 12.B 13.D 14.C 15.B 16.C 17.D 18.A 20.A