Question

— I'll borrow this book from Betty．

— ________ take it without her permission．

1. A.
   Better not
2. B.
   It's better you should not
3. C.
   You'd better not to
4. D.
   Better you don't

Answer 1

A
这句句子的意思是“——我将从贝蒂那里借一本书。——没有她的允许，你最好不要这么做。”回答的后半句完整回答应该是：You'd better not do it．所以B项和D项均不对，而had better后面我们用动词原形，故C项也不正确。而A项的Better not就是You had better not do it的省略结构，所以我们选A项。