The telephone ________ in 1876.
A. invents B. invented
C. is invented D. was invented
Look! The workers ________ some subways now. the traffic in Nanning will be better soon.
A. build B. built C. are building D. were building
You will be late for school ________ you don’t get up early.
A. but B. and C. if D. or
Animals are our good friends. We are supposed ________ them.
A. to protect B. protect
C. protecting D. protected
–Have you ever been to Guilin?
--No, ________. I hope I can go there next year.
A. always B. sometimes C. never D. often
During summer, lots of people swim in the pool, so it is very ________.
A. clean B. similar C. beautiful D. crowded
