题目

I recommended strongly that you ______a more powerful computer, even though your brother recommended ______ an ordinary one.   A. bought; to buy    B. buy; buying    C. would buy; to buy   D. bought; buying 答案：B 解析: recommend用作“建议”时，后接从句，从句中谓语动词用should+动词原形，should可以省略；recommend后接动词时，要用动词的-ing形式。12的因数有______。