问题
______ is dangerous for children to swim in the river alone.
A:It
B:That
C:This
D:He;
B:That
C:This
D:He;
正确答案是：
同类题型
The police warned the children __________football in the street.
His sister’s never been to the Summer Palace,
I’m sorry! I would have taken him to hospital if I had known he was seriously ill.— But ______
The boy will _______ crazy if you do not allow him to use the computer.[ ]
Millie’s eyes ________ dark brown and her hair ________ black.