He went home for lunch____ the clock struck twelve.   

    you meet with new words when reading English articles , you can guess the meaning first .

Sometimes people just believe what they see, ______the reality may be different.

It was quite a long time ______ I figured out what had happened to the manager.

It puzzles the scientists _____ some mammals produce their young _____ others lay eggs.

________ we have got everything ready, let’s begin the debate. 

you can borrow my car     you promise not to drive too fast.

It was not until dark ______ he found ______ he thought was the correct way to solve the problem.

_____Craig loves his students, he is very strict with them in their performances.

——Did you stay up very late last night?
——No，It was not 10 o’clock yet ____I went to bed.