It’s hard to finish the work in a day. You’d better ____ your friends to help you.

Attention, please. The plane has to be _____ because of the heavy rain.— Oh, bad luck! We have to wait now.

The watch is made _____ Japan.[ ]

It suddenly _________ to the detective that the millionaire was probably murdered by his own daughter.

Trees provide food and shelter and make us ______ comfortable.