Only in this way _______ to make improvement in the operating system.
| A．you can hope | B．can you hope |
| C．you did hope | D．did you hope |
相关试题
So far there is no proof people from other planets do exist.
| A．how | B．what | C．which | D．that |
_____ scores of times , but he still couldn’t understand it ．
| A．Having explained | B．Having been explained |
| C．Though it was explained | D．It was explained |
________ their son away to college, the old couple got more room in the house．
| A．As | B．For | C．Through | D．With |
_______ that Marie was able to set up new branches elsewhere．
| A．So successful her business was | B．So successful was her business 20090908 |
C．Such successful business she had | D．So successful business had she |
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