Luggage may not be brought into the building ________ a guard has checked it first.
| A．when | B．because |
| C．after | D．Unless |
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 |
Although he lived ____ in a ____ mountain village, he didn’t feel ____ at all.
| A．alone; alone; lonely | B．alone; lonely; lonely |
| C．lonely; lonely; alone | D．lonely; alone; alone |