Bill often spends as much money as he has________ science books.

You’d better put away the magazines you have read, for they _______ be of great use later.

下列情境中，售货员的回答最得体的一项是（ ）某顾客到商场买拎包，她看不出自己选中的拎包是否用真皮制成，她听说过一种检验是否真皮的做法，就是用指甲划包包，真皮是划不破的。她向售货员提出自己要求。面对这过分的要求，售货员微笑地说：“ ”

Is it possible for David to win first prize in the running race–______. He needs to practice more.

下列加点的固定结构，解释不正确的一项是