Sorry, I have to ________ now. It’s time for class. — OK, I’ll call back later.

I read more books _____ I can catch up with my classmates.

It is difficult to design a programme that will meet the__________needs of all our users.

I’m still too hungry. Please give me _______________ hamburgers.

Know more words and expressions, ______ you will find it easier to read and communicate.[ ]