--Why are the windows so dirty?
--Because we_________them for a long time.
A. have cleaned B. haven't cleaned C. didn't clean
We waited over hour for the train.
A. a B. an C. the
We couldn’t have a party the heavy snow.
| A．because | B．if | C．so | D．because of |
Lu Xun is famous(著名的)all the people know it.
| A．as; as | B．so; that |
| C．such; as | D．so; as |
Tina her grandmother three days ago.
| A．visits | B．is visiting |
| C．visited | D．visit |
When I swim in the river, I I’m a fish.
| A．look like | B．sound like |
| C．feel like | D．am like |