Look, so many people are running out of the station. I wonder what ______ .
| A．is happened | B．was happening |
| C．is happening | D．had happened |
The Palace Museum is the best place ______I’ve ever visited.
| A．that | B．which | C．where | D．what |
Here is the book. First ______it and then tell me what you think of it.
| A．look into | B．look through | C．look up | D．look after |
I’m looking after Tom today. He’s been in my house______8:00 this morning.
| A．at | B．for | C．since | D．till |
－Two hundred yuan for such a T-shirt! You ______ be joking!
－I’m not joking . It’s made of silk.
| A．can’t | B．can | C．need | D．must |
－Which do you prefer, a CD player or a walkman?
－______. I prefer a portable computer.
| A．Both | B．Either | C．None | D．Neither |