用括号内所给动词的适当形式填空。
【小题1】The report shows that some animals can be trained (train) to work for people.
【小题2】Those dried flowers don’t sell (not sell) as well as the fresh ones.
【小题3】Where is Jim? I’m afraid he has forgotten (forget) the visit to the museum.
【小题4】The passengers were told that the plane would take (take) off in two hours because of the bad weather.
【小题5】—It is reported the police searched the whole building yesterday but nothing unusual was found there.
—Really? I thought (think) the thief had already been caught.
【小题6】In order to plete the task, all the club members had no choice but to stay (stay) up late.
【小题7】He failed the math exam again because the bell had rung/rang (ring) before he finished the rest half of the testing-paper.
【小题8】Many scientists are always trying to devote themselves to studying (study) in different areas.
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解析：
【小题1】考查被动语态。主语和谓语train是被动关系，故用被动语态。故填be trained。
【小题2】考查被动语态。sell, wash等词，当表示事物本身的属性时，用主动表示被动，故填don’t sell。
【小题3】考查时态。根据is可知，是现在的情况，句意是“恐怕他已经忘记要去参观博物馆了”。故填has forgotten。
【小题4】考查时态。根据were可知，从句用过去将来时。故填would take。
【小题5】考查时态。根据情境可知，“我”原先认为......，故用过去时。故填thought。
【小题6】考查固定句型。have no choice but to do sth别无选择只好做某事。故填to stay。
【小题7】考查时态。在完成剩下的题目之前，铃响了。用过去完成时或过去时皆可。故填had rung/rang。
【小题8】考查固定搭配。devote oneself to doing sth“致力于......”。故填studying。