It is required that every student _________ their homework on time．


  1. A.
    will hand in
  2. B.
    must hand over
  3. C.
    hands out
  4. D.
    hand in
D
解析：
It is required that…從句要用虛擬語(yǔ)氣，謂語(yǔ)形式要用should do或do。
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