问题
___________ is known to everyone, the moon travels round the earth once every month.
A:It
B:As
C:That
D:What
B:As
C:That
D:What
正确答案是：
同类题型
It’s dangerous to let the children who are ____ walk across the crowded street
She doesn’t look after her ______ . She often eats ______ food.
Mum, could you buy me a dress like this—Certainly, we can buy ______ one than this, but______ this.
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