题目内容

I have trouble ________ the new words.
A．memorizeB．memorizingC．to memorizeD．memorized
B

试题分析：have trouble in doing表示“在做某事方面有困难”是固定用法,in 可以省略。the new words生词；memorize记住； 本句的意思是“我记住这些生词有困难。”所以本题选B。
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