Without good instructions of the teacher, you will be likely to___________ a lot of bad habits while you are practising the piano.

There are three ______ and seven _______ in thepicture.

The committee is discussing the problem right now. It will _____ have been solved by the end of next week.

It is nice to see millions who had nothing but arecord of misery and hungry ______ to improve their life and living conditions．

You ______run with train when the train is coming. It’s dangerous.