能帮我做几道英文题目吗
7.I haven’t seen Mary for a long time.What do you suppose __ ___ to him?
A.had happened B.to happen
C.has happened D.was happening
9.The worse the health conditions,the higher the __ ___ of death.
A.pace B.ratio C.rate D.speed
11.The intelligent subway system uses advanced computer and satellite _____ .
A.skills B.method C.techniques D.technologies
13.It’s _____ in the rule that all committee members must keep the content of the meeting confidential.
A.laid off B.taken down C.put off D.laid down
14.Genes do _____ a lot in your test performance,but they are not all.
A.remain B.expect C.decide D.count
15.– I’m sorry to keep you waiting.
--- Oh,that’s all right.I ___ here only a few minutes.
A.have been B.had been C.was D.will be
18.The policewoman said that the suspect _____ around the store when she saw him.
A.was hanging B.hung C.had been hanging D.was to hang
19.All the students in his class like his teaching ___.
A.method B.approach C.means D.purpose
20.Do you think the end can justify the _____
A.method B.approach C.means D.purpose