—Tom wants to know if you will have a picnic tomorrow.—Yes. But if it ______, we’ll play chess instead.
-- What is the function of the mouse?-- It________ the cursor(光标) on the screen.
-- I’m sorry we ________ all the educational CD-ROM. Can you come next week?-- Please call me as soon as the latest one _________.
He is a teacher with a lot of ______. He often tells us many of his interesting _____ in Africa.
A: Can I _______ a book from you? B: Certainly. But you mustn’t ______ it to others. And please remember you can only ______ it for a week.
If you ___him tomorrow,please ask him if he____ to work on the farm with us.