. The train _____ for twenty minutes.
| A．left | B．has left | C．is leaving | D．has been away |
_______ necessary for us _______ English well.
| A．This is; to learn | B．It’s; to learn |
| C．It’s; learn | D．That’s; learn |
—Watching TV too much _______ bad for your eyes.
—I’ll go to bed right away.
| A．is | B．are | C．was | D．be |
---Would you mind ______ the door? It’s cold outside.
--- OK. I’ll do it right now.
| A．opening | B．no opening |
| C．closing | D．not closing |
---Is doing morning a good habit? ----Yes, it is.
| A．exercise | B．exercises |
| C．exercising | D．exercised |
It’s my ___________ time to go to Beijing. I never went there before.
| A．two | B．second | C．one | D．first |