No hurry. They will arrive _____ twenty minutes.[ ]

They need to _______ some good ideas to help the old people in the Old People’s Home.

Hello, Mary! This is John. You must know why I _________ you.－Oh, hello, John! I’ve waited for this call since last month.

Did you take part in the sports meeting last week?—Of course I didn’t, don’t you know that it was ______ because of the rain.

Miss Li Mary’s MP4 when they were having an art class yesterday.