题目内容
Experiments of this kind ___in both the U．S and Europe well before the Second World War
| A．had conducted | B．have conducted |
| C．have been conducted | D． had been conducted |
D
解析试题分析：句意：在二次世界大战之前这种实验在欧洲和美国进行得很好。the Second World War发生在过去，又因为before在…….之前，所以表示的是过去的过去，Experiments of this kind与conduct是被动关系，故用被动语态。根据句意故选D。
考点：考查动词时态的用法。
Every year he ________ to Beijing to visit his teacher.
| A．have come | B．comes | C．came | D．come |
The employees feel so excited ! At this time tomorrow morning they to Sanya, one of the most attractive cities in China.
| A．will be flying | B．will fly | C．have been flying | D．have flown |
--- Nancy, can I take a look at the note you took for last period, please?
--- I’m sorry, I __________ something else then. I’ll make it up right away.
| A．did | B．was doing | C．had done | D．have done |
Unfortunately, when I arrived she ________, so we had only time for a few words.
| A．just left | B．had just left | C．has just left | D．was just leaving |
Miss Li ___as a secretary for five years in the company, and now she is general manager of it.
| A．serves | B．served | C．has served | D．had served |
－When will the expert come and give the lecture on economic development
－Not until our program ____by the government
| A．approves | B．is to approve |
| C．will be approved | D．has been approved |
A new library downtown. They hope to complete it by the end of this year.
| A．is being built | B．has been built |
| C．will be built | D．is building |