The earth is the only planet __________ provides us with everything we need. It’s our duty to protect it.
A. who B. what C. that
--The man I saw yesterday __________ around my house again.
--Let’s call the police right now.
A. was walking B. has walked C. is walking
--Excuse me, when can we play basketball on the playground?
--Not until the playground __________ next week.
A. will repair B. will be repaired C. is repaired
--Can I go now, sir?
--If you __________ leave, do it quietly.
A. should B. must C. may
-- Can’t I park my car free here?
-- You can, for four hours, __________ you spend over 100 yuan in this supermarket.
A. though B. if C. unless
--Who should be responsible for this terrible traffic accident?
--It's not the right time to discuss that. __________, we should send her to hospital.
A. As a result B. All in all C. Above all
