2011年下半年英语四级考试单项选择训练四

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2011下半年英语四级考试单项选择训练四
        　　16.In order to increase our output， we need to import more production _______.
        　　A. facilities B.hens C.votes D.artists
        　　17.When a spacecraft travels， one of the major problems is reentry into the Earth’s _______.
        　　A. surface B.atmosphere C.attitude D.bent
        　　18.This river forms a natural _______ between China and Korea.
        　　A. boundary B.string C.spot D.zone
        　　19.She is already 16years old. But she _______as if she were still a little girl.
        　　A. believes B.absorbs C.accrses D.behaves
        　　20.We are _______ at the rapid progress Mark has made in this semester.
        　　A. distinguished B.annoyed C.astonished D.scored
        　　16.A 17.B 18.A 19.D 20.C