Do you know__the visitors have visited the Great Wall?A.if B.that 选哪个?请给出详解,
问题描述：
Do you know__the visitors have visited the Great Wall?
A.if B.that 选哪个?请给出详解,
答
A
答
if 是否
用that 不行
答
选if,译为；你知道这些旅行者是否已经去过长城了?
答
选B，因为这句话Do you know the visitors have visited the Great Wall？
没有加任何的词也是可以读通的，所以选that