Little _____ about A-H1N1 so far, so there is no doubt that many people are afra

题型：安徽省模拟题难度：来源：

Little _____ about A-H1N1 so far, so there is no doubt that many people are afraid when talking about the disease.
A. did scientists know
B. scientists have known
C. have scientists known
D. had scientists known

答案

举一反三

一 Are you going to further your studies after graduation?
一 Well, I _____ yet. I might make some other choices.
A. didn"t decide
B. haven"t decided
C. don"t decide
D. hadn"t decided

题型：江苏模拟题难度：| 查看答案

I _____ that actress in quite a few films, but her name escapes me for the moment. [ ]
A. saw
B. have seen
C. see
D. had seen

题型：浙江省模拟题难度：| 查看答案

The country life he was used to _____ greatly since 2000. [ ]
A. having changed
B. has changed
C. changing
D. have changed

题型：陕西省模拟题难度：| 查看答案

I _____ the dance performance many times, each giving me a new understanding. [ ]
A. watch
B. watched
C. have watched
D. am watching

题型：浙江省模拟题难度：| 查看答案

Can you make sure _____ the key of her flat? [ ]
A. whether Alice had put
B. where had Alice put
C. where Alice has put
D. where has Alice put

题型：同步题难度：| 查看答案