What's your opinion of Mr.Li's request that we ______ spend half an hour reading English aloud every morning?
The next thing he saw was smoke ______ from behind the house.
They began to think about what use could be ______ such materials.
Tom ______ close the window when his attention was caught by a bird.
He has made some spelling mistakes in the paper; ______, they are not serious.
I ______ say he ______ speak to her in public at that time, for he was such a shy boy.