—How clean the window is!
—Yes, it just now.
A、cleaned B、has been cleaned C、was cleaned
---- Look at the sign on the right!
---- Oh， smoking ___ here.
| A．isn’t allowed | B．doesn’t allow |
| C．didn’t allow | D．wasn’t allow |
---- ___ watching English-language TV to practice listening?
---- Good idea. I think it helps.
| A．Why not | B．What about |
| C．How | D．Shall we |
Could you say it again? I can’t understand ___ you are talking about.
| A．how | B．when | C．what | D．which |
---- I like playing football very much.
---- Why don’t you ___ a football club?
| A．take part | B．join in |
| C．join | D．attend |
--- Do you learn math ___ asking the teacher ___ help?
---- Oh， yes. It helps a lot.
| A．by； for | B．for； by |
| C．by； to | D．to； by |