—My son is addicted to drugs. He isn’t hopeless, is he?
—Yes, _____ he mends his ways and starts all over.

Please remind me to watch the TV program Growing tomorrow       I forget．

—I’m going to the post office.
—      you’re there, can you buy me some stamps?

I’d love to stay in the community        I grew up, but ambition can drive me to the city to be “      the big companies are”.

Telephone users sometimes complain about unreliable service and       they consider unfair charges.

Air pollution is getting more and more serious, so we must take action          it is too late.

David worked hard at his lessons ____ he gained high grades in the exams.

This study shows that ______language may differ，the order in which young kids learn the parts of speech appears to be the same across different languages.

Steps must be taken _____ this kind of disaster will never happen again.

I set up e-mail addresses for my mum and dad ________ I could e-mail them regularly.