题目内容
用括号内所给动词的适当形式填空。
1.I ________ (read) a novel last night when I heard knocks at the door.
2.The young man ________ (live) alone since he graduated from college.
3.Be careful ___________ (not fall) off the ladder.
4.The actor and director ________(be) coming to give us a speech next weekend.
5.I overslept this morning. By the time I got to the train station, the train ________ (leave).
【答案】
1.was reading
2.has lived
3.not to fall
4.is
5.had left
【解析】
1.句意：昨晚当我听到敲门声时，我正在读一本小说。结合语境可知上文描述的是过去某时正在进行的动作，故用过去进行时态。主要I是单数第一人称，故助动词用is的过去式was，结合所给单词，可知填was reading正在读。
2.句意：自从大学毕业以来，这个年轻人就独自生活。结合语境可知本句描述的是从过去一直持续到现在的动作，故用现在完成时态。结合所给单词，可知填：has lived居住。
3.句意：小心不要从楼梯上摔下去。不定式做表语补足语表示具体的将要进行的动作，其否定表达是在不定式符号to的前面加not，结合语境及所给单词，可知填；not to fall不要摔下。
4.句意：这位演员兼导演下周末要来给我们做一场演讲，结合语境可知本句描述将来动作，be动词加表示位移动词的现在分词可以表示计划打算发生的动作。主语The actor and director 指的是同一个人，故助动词用单数形式，结合所给单词，可知填is
5.句意：我今天早上睡过头了。当我到达火车站时，火车已经出发了。结合语境可知下文描述的是过去某时前已经完成的动作，故用过去完成时态。结合语境及所给单词，可知填had left，已经动身。
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