题目内容
In order to find the missing child, villagers _______ all they can over the past five hours.
| A．did | B．do | C．had done | D．have been doing |
D
解析试题分析：句意：在过去的5小时里，村民们为了找到丢失的孩子，一直做他们所能做的一切。over /during/in+the past /last+时间短语，经常与现在完成时连用。故选D。
考点：考查时态的用法。
Until we have discussed all the details, no decision_________ about any new operations.
| A．will be made | B．is made |
| C．is being made | D．has been made |
The past two years ______a sharp rise in oil price, which adds to the burden of auto transportation industry.
| A．has witnessed | B．witnessed | C．is witnessing | D．witnesses |
I would have gone to my cousin’s birthday party last night, but I ______ available.
| A．was | B．had not been | C．was not | D．would not be |
Joseph _____ to evening classes since last month, but he still can’t say “What’s your name?” in Russian.
| A．has been going | B．went | C．goes | D．has gone |
Oh, my God! Is this your room? The furniture here remains _____ with such thick dust!
| A．covered | B．covering | C．to cover | D．be covering |
—You haven’t got the textbook for my chemistry yet.
—I know, and we ________ to get it for the last five weeks.
| A．will have been trying | B．have been trying |
| C．will be trying | D．had tried |