By the time he was twelve, Edison __________ to make a living by himself.
—What should we do since we can’t make a compromise after lengthy talks. — ____ you apologize and take back what you’ve said _____ it is all over between us.
---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.