Not until the teenager left his hometown ________ how much he loved it.
A. did he know B. he knew
C. had he known D. he had known
--Yao Yuan,a disabled woman,won the National Championships Cup last week.
--My goodness! She _______a lot of difficulties!
A. may go through B. might go through
C. must have gone through D. ought to have gone through
Don’t take up other people’s personal space, ______ will bring much inconvenience to them.
A. where B. which C. what D. that
Everyone queued up before the booking office in silence, having nothing to do but _________.
A. to wait B. waiting C. wait D. waited
I tried all I could do ______ the topic at the meeting, but failed.
A. avoid mentioning B. to avoid mentioning
C. avoiding to mention D. avoiding mentioning
--The Chinese government is trying to protect the giant panda.
--I know. By 2020, they _________ about 69,500 square miles of land to the country’s nature reserve system.
A. add B. are adding
C. will add D. will have added
