题目

在下列各数：3.1415926、 、0.2、、、、、中，无理数的个数(        ) A、2         B、3         C、4             D、5 答案：A—Please _______ to return my book by Friday. I'll use it on Saturday.—No, problem. I'll finish reading it on Thursday. [     ]A. don't forgetB. not to forgetC. not forget D. forget not to