With online course Crazy English has over 20 million students all over China _______ the class through the Internet .
| A．attend | B．attended | C．attending | D．to be attending |
The discussion_______________alive when an interesting topic was brought in.
| A． was coming | B．had come | C． has come | D． came |
My mind wasn’t on what he was saying so I’m afraid I________________half of it.
| A． was missing | B． had missed | C． will miss | D． missed |
All the preparations for the task ___________, and we’re ready to start.
| A． completed | B．complete |
| C．had been completed | D．have been completed |
Visitors ________not to touch the exhibits.
| A． will request | B．are requested | C．are requesting | D．request |
I hope there are enough glasse for each guest to have ________.
| A．it | B．those | C．them | D．one |