The teacher commanded that the naughty boy _____, but he refused.
| A．stand up | B．stood up | C．would stand up | D．had stood up |
--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 |