—Can I speak to Mr. Wang, please?—________
----I can’t see the words on the blackboard clearly. ----Why, your eyes need _____. Perhaps you need ______ glasses.
I _____ to help you but I was not able to spare any time. I _____a paper last night and I’ll have to finish it today.
What’s that actor _____that we saw in the film last night?
Not only _____interested in changing teaching methods but _____beginning to show an interest in it.
Many people believe we are heading for environmental disaster _____we radically(彻底地) change the way we live.