Although he is very old, ______ he works very hard.
| A．so | B．but | C．and | D．/ |
There are so many kinds of computers in the shop .Ican’t decide ________。 .
A. which to buy . B.what to buy C. how to buy .
When you have_____test，you must be careful all______time 。
A. a；/ B. a；the c. an；a
There are more than twelve students in the restaurant now.
| A．too much | B．over | C．around | D．less than |
Please take care of the fish for me while I’m away.
| A．look after | B．look up | C．take care | D．take after |
Thanks for asking me to your party, Rosa.
| A．telling | B．inviting | C．letting | D．answering |