If giant pandas have no food, they . If we do not protect giant pandas, they .[ ]

What _____ weather! We can’t go boating today.—I’m afraid we have to watch TV at home.

This problem is too difficult. — You can’t work out the math problem unless you ______ to your teacher carefully. [ ]

The clock is ______the wall ______ourclassroom.[ ]

Did you see the film last night? — Yes, I have never seen ____exciting film before.