---Don't put the waste on the ground.
---Oh, I'm very sorry. I ________ the dustbin（垃圾箱） there.
| A．don't see | B．isn't seeing | C．didn't see | D．haven't seen |
As far as I know, the new highway is about______ the former one.
| A．as wide as three times | B．three times the width of |
| C．longer than twice | D．the width of three times |
Was it in 2002 __________ he was still at middle school __________ the boy became expert at computer?
| A．that; where | B．when; where | C．that; when | D．when; that |
The professor wants the students to pay more attention to the festivals ______ in other parts of the world.
| A．celebrating | B．having celebrated | C．celebrated | D．to celebrate |
The news has spread all over the country ________ an earthquake happened last night.
| A．that | B．which | C．whether | D．what |
It’s too late. Go to bed right away. Forget you need to get up as early as you can ______ the early train?
| A．catch | B．catching | C．caught | D．to catch |