The city park will be cleaner ___________ people stopdropping litter here and there.

Hearing the news that he failed in the entrance exam a third time, he sobbed _________

Yao Ming set up his My SpacePagehe could respond to his fans.

May I go to play football with Mike now, Dad? ——No, you can’t go out ______ your homework is being done

That’s the new machine ______ parts are toosmall to be seen.