_______Wale_______at school，he would gain much higher a salary.
| A．Had;worked | B．If;worked |
| C．Did;work | D．If;has worked |
相关试题
It is pretty well understood __________controls the flow of carbon dioxide in and out the atmosphere today.
| A．that | B．when | C．what | D．how |
____is certain is ___prevention is more important than treatment .
A．It;that  |
B．What;that | C．As;what | D．What;what |
_______has recently been done to provide more buses for the people ,a shortage of public vehicles remains a serious problem .
| A．That | B．What | C．In spite of what | D．Though what |
The experience of the Chinese nation attests to a truth____ a nation loses in times of disaster will be made up for by her progress
| A．that what | B．what | C．that | D．what that |
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