____ that silver is not widely used as a conductor?
| A．Why is | B．Is it why | C．Why is it | D．Why is that |
--- Look at the black clouds. It ______ soon.
--- Sure. If only we ______ out.
| A．is raining; didn’t come |
| B．is to rain; won’t start |
| C．will rain; haven’t started |
| D．is going to rain; hadn’t come |
Jim talked for about half an hour yesterday. Never ______ him talk so much.
| A．I heard | B．did I hear |
| C．I had heard | D．had I heard |
I want to buy that kind of cloth because I______ the cloth ______ well.
| A．have told; washes |
| B．have been told; washes |
| C．was told; washed |
| D．have been told; is washed |
--- Remember the first time we met, Jim?
--- Of course I do. You ______ in the library.
| A．were reading | B．had read |
| C．have read | D．read |
The train ______ at the present speed until it reaches the foot of the mountain at about nine o’clock tonight.
| A．went | B．is going | C．goes | D．will be going |