Safety in school has be
en of great concern because of frequent reports about accidents _______ students got injured or killed while in school．
| A．in which | B．when |
| C．that | D．for which |
The road conditions there turned out to be very good, ______ was more than we could expect.
A what B that C which D why
The news reporters hurried to the airport, only_______ the film stars had left.
A to tell B to be told C telling D told
_______ many times, he finally understood it.
A Told B Telling C To told D Having been told
------What _______ can you draw f
rom the result of the experiment.
------Iron doesn’t rust in air-free water.
A decision B conclusion C impression D expression
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