—Why don't you go home?—Because a lot of work________yet.
---I ’ m afraid that you might have got burnt in the big fire last weekend. ---Well, I .
The Great Wall is so good a place ________ many foreign people come to visit ________ it has become well known all over the world.
The college students must study hard toa good knowledge of advanced information technology.
This area experienced______ heaviest rainfall in_______ month of May.
The number of people ________ this happens is not very large.