I was told that although these old buildings _______ the Qing Dynasty, they remained in good condition.
| A．are dated back to | B．dated back to |
| C．dating back to | D．have dated back to |
Mr. White told us _______ run up and down the hall.
| A．don’t | B．didn’t | C．not to | D．to not |
Only when I left my parents for Italy _____ how much I loved them.
| A．I realized | B．I had realized | C．had I realized | D．did I realize |
He is the man _________ you can turn when you are in trouble.
| A．that | B．which | C．to whom | D．to him |
Look at the timetable (时刻表). Hurry up! Flight 4026 _______ off at 18:20.
| A．takes | B．took | C．will be taken | D．has taken |
Do you have any difficulty ______ these flowers? I’d like to help you if you need.
| A．to plant | B．for planting | C．with planting | D．in planting |