We should have teamspirit but there are a few occasions_____members are uncertai
题型：不详难度：来源：
We should have teamspirit but there are a few occasions_____members are uncertain of their roles.| A．when | B．whose | C．why | D．which |
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答案
| A |
解析
| 先行词occasion意思为 “场合；时刻”，表示时间，且从句中不缺主语和宾语，故此处用when引导定语从句，when在从句中作状语。 |
举一反三
He has made another wonderful discovery,___ of great importance to science.| A．who I think it | B．which I think it is | C．that I think is | D．which I think is |
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____ has finished the work ahead of time will be rewarded though we don"t know who it will be.| A．Those who | B．Anyone | C．Whoever | D．No matter who |
|
—Did your uncle phone you again the next day?
---No, it was a fortnight ___ he gave me a second call.| A．that | B．when | C．before | D．since |
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| The boy dived into the water and after ___ seemed to be a long time, he came up again. |
| I would appreicate ___ very much if you could tell me something about bird flu. |
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