do you study for tests? —I studylistening to tapes.

Have they found the lost flight MH370—Not yet. I’m really ______ the people on the plane.

He does help others, but he always expects returns ____As a result, nobody will accept anything from him[ ]

s a very convenient place to live in,is an airport connecting all the big cities.

The scientists are studying the effects of human activities______the environment