单选题
中国农业银行
2016-05-01
Youbuy a gift, but you can if you want to.
A. must
B. mustn't
C. have to
D. don't have to
参考答案
D
答案解析
【答案】D。解析:根据句意你不一定(don’t have to)要买礼物,但是如果你想,你可以买。B项是禁止,易混淆,但不符合语境,故排除。
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