the boys always promise （）computer game again A.not playing B.not to play C.not plays.
问题描述：
the boys always promise （）computer game again A.not playing B.not to play C.not plays.
答
B
promise not to do sth承诺不做某事。
答
B
答
B
promise to do 承诺做.
其否定形式即为 promise not to do
答
B (promise not to do sth 答应不做某事）