1. 除非你很早起床，要不你赶不上早班汽车。
    _______ you get up early, you _______ the early bus.
2. 昨晚他在看电视时，我正在发电子邮件给我的笔友。
    I _______ to my pen friend _______ last night.
3. 吉姆别无选择，只能把所有努力倾注于工作之中。
   Jim has _______ but _______ the work.
4. 我不能确信他能和所有的同学相处得很好。
    I_______ he can _______ all his classmates .
5. 当他们到达电影院时，电影已经开始五分钟了。
    When they _______ the cinema, the film _______ for five minutes.

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