问题

Where was the boy taken away by the UFO?—Oh, it was in the lake ______ he was swimming[ ]

A: that
B: where
C: because
D: at which

正确答案是：

同类题型

______________ twice a year，whether it is a car，a bus or a truck，is the rule that every driver must obey in this city．

__________—In a factory.

I went to school____ it rained heavily.

This is the best book _____ I have beenlooking for all this year

We are sparing no efforts to create _____ more peaceful and more advanced world, ____ place where everyone enjoys his life and freedom.