A warm thought suddenly came to meI might use the pocket money to buy some flowers for my

问题补充：

A warm thought suddenly came to meI might use the pocket money to buy some flowers for my mothers birthday。

A. if

B. when

C. that

D. which

答案：

A. if

B. when

(答案→)C. that

D. which

解析：主要测试同位语从句。句子意思：我突然有了一个很好的想法：我可以用我的零花钱买些花作为母亲的生日礼物。与以上翻译可知名词thought的内容就应该是句子I might use the pocket money to buy some flowers for my mothers birthday的内涵，另外结合语境可知句子中不缺少任何成分，只是少了应道同位语从句的引导词。所以答案应该是C。