His hard work paid ____ when he got the result.
| A．off | B．over | C．out | D．back |
---John has made great progress in the last two months.
--- _________, and _________.
| A．So he has; so you have | B．So he has; so have you |
| C．So has he; so have you | D．So has he; so you have |
The house, ____________is blue, will be used as a library.
| A．whose the roof | B．the roof of whose | C．the roof of which | D．which roof |
Petroleum(石油), along with fuel gas, ________ in price. Thus a larger amount of money __________ spent on transportation.
| A．has risen, is | B．have risen, are | C．has risen, are | D．have risen, is |
---You are late again! We _________you could attend the assembly on time.
---Sorry, I __________to my office to get my papers.
| A．think, went | B．thought, have gone | C．think, were going | D．thought, went |
It’ s suggested by experts that teenagers ____at least 30 minutes exercising, five times a week.
| A．spend | B．to spend | C．spent | D．have spent |