______your homework carefully, and some spelling mistakes can be avoided.
| A．Had you checked | B．Check | C．Checking | D．If you check |
Three students in ten will go and _____ to stay in the classroom.
| A．the rest are | B．the rest is | C．the other are | D．the other is |
The beef is too expensive. I won’t buy it _____.
| A．at that price | B．at a that price |
| C．on that price | D．in that price |
The medicine _____ natural plants.
| A．is made of | B．is made from |
| C．is made in | D．is made into |
----- I’m going to the States.
----- How long ______ you ______ in the States?
| A．are; stayed | B．are; staying |
| C．have; stayed | D．did; stay |
I don’t think _____ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |