Why not __ your new ideas? Otherwise you will never know whether they are possible or not.

I’m quite willing for your brother ____ us. [ ]

Mary won the first prize in the competition.—-_________. She said she made several terrible mistakes.

The weather is becoming _______________.

The lecture given by Professor Johnson on the Antarctic is very attractive, and at the beginning, it is _____ asking us questions about the mysterious continent.[ ]