Scarcely ________ ourselves in the theatre when the curtain ______ up.
| A．had we seated; went | B．we had seated; went |
| C．seated; had gone | D．did we seated; had gone |
_______ the teacher’s instruction in the lab_____ important.
| A．Following; are | B．Following; is | C．Followed by; are | D．To follow; are |
E-mail, as well as telephones, ______ an important part in daily communication.
| A．is playing | B．have played | C．are playing | D．play |
Professor Wang has written some short stories, but he is______ known for his plays.
| A．the best | B．more | C．better | D．the most |
This is the very information _______ we can learn what is selling best in the market. .
| A．from which | B．that | C．which | D．from that |
All _____ can be done has already been done.
| A．/ | B．what | C．that | D．which |