-Do you know_______ second-hand smoke?
-To protect our health and memory.
| A．how we should prevent | B．why should we prevent |
| C．why we should prevent | D．how should we prevent |
Where are you going this month?
We_________ go to Xiamen, but we’re not sure.
| A．needn’t | B．must | C．might | D．mustn’t |
What languages ________ in that country?
German and English.
| A．are speaking | B．are spoken | C．speak | D．is spoken |
Why not go to Lao She Teahouse tonight?
| A．It doesn’t matter | B．Thank you |
| C．Sorry to hear that | D．Sounds great |
________ I got back, I found my mother cooking for me.
| A．When | B．Before | C．Since | D．Although |
Is Tom at home?
No, he_______ to town.
| A．has been | B．has gone | C．goes | D．will go |