Hewassurprisedtoseehismother_______atthebackoftheclassroom[ ]

ember of one world, each of us has a role _____to make the earth a better place.

The 3G mobile phone has influenced people’s life a lot since it ___

Every few years, the coal workers ________ their lungs Xrayed to ensure their health.[ ]

Hi! My name’s Tim. It’s my first time to be here.– _______.