问题
选择题
--- Is John doing his homework now?
--- He shoul
d, but he _______ not. He likes playing computer games.
A．must
B．could
C．need
D．may
答案
答案：D
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--- Is John doing his homework now?
--- He should, but he _______ not. He likes playing computer games.
A．must
B．could
C．need
D．may
答案：D