--- Who has eaten all the cake, Jim? --- Oh, must be your two pet dogs.
I don’t expect the children to be noisy, nor ________ them to be quiet.
It’s difficult to ___ these old books for some of them ______ none of the classification.
Many kinds of animals and plants die _________ every year.
We should do something to _______ the plant ______ the cold weather.
I’d appreciate _______ if you would teach me how to use the computer.