—He asked herthe bag because it was too expensiveA. not to buyB. to buy notC. not buyingD

问题补充：

—He asked herthe bag because it was too expensive．

A. not to buy

B. to buy not

C. not buying

D. not buy

答案：

(答案→)A. not to buy

B. to buy not

C. not buying

D. not buy

解析：考查非谓语动词的用法。固定结构ask …to do sth“请求…做某事”、 ask …not to do sth“请求…不要做某事”，此处使用不定式的否定结构，直接在不定式前加not。