To improve your spoken English, you’d better listen to the tape __________

If the machine makes a mistake — ____ rarely happens — it gives a warning in the form of a red light.

The Project Hope _____ to help the poor children to go to school in China _____ to be a success.

They advised him to give up smoking, but he didn’tlistenSo their attempts were __.[ ]

Jbut he ________ careful enough.