Do you know how long our earth _____?A. came into existence B. came in existence
题型：0110 同步题难度：来源：
| Do you know how long our earth _____? |
A. came into existence
B. came in existence
C. was in existence
D. has been in existence |
答案
举一反三
| There is a police car in front of our neighbor"s house. What do you suppose ______? |
| [ ] |
A. did happen
B. has happened
C. is happen
D. has been happened |
| Great changes ______ in the city, and a lot of factories ______. |
A. have been taken place; have been set up
B. have taken place; have been set up
C. have taken place; have set up
D. were taken place; were set up |
| Danny _____ hard for long to realize his dream and now he is popular. |
| [ ] |
A. works
B. is working
C. has worked
D. worked |
| By the time he realizes he _____ into a trap, it"ll be too late for him to do anything about it. |
A. walks
B. walked
C. had walked
D. has walked |
— Are you waiting for a bus from Medical University?
— Yes. I arrived here at the bus stop ten minutes ago, but the bus _____. |
A. hadn"t come
B. won"t come
C. didn"t come
D. hasn"t come |
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