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1. When did you come back to China?
    When did you __________ __________ China?
2. Most countries use English to describe their hotels.
    __________ __________ __________ countries describe their hotels __________ English.
3. Hurry up, or you will be late.
    __________ __________ __________ hurry, __________ be late.
4. They tell you how to use a word.
    They tell you how __________ __________ use a word.
5. Dictionaries are both useful and interesting.
    Dictionaries are __________ __________ useful __________ __________ interesting.