Generally speaking, ______ according to the directions, the drug has no side effect.
| A．when taking | B．when taken | C．when to take | D．when to be taken |
If a computer crashes,you will lose the file you _____ on unless you save it regularly.
| A．are working | B．work |
| C．will work | D．worked |
There you can see beautiful tall buildings on _____side of the square.
| A．all | B．either | C．both | D．every |
Only when you stay and live with___ local people for a period of time will you have
____better understanding of life here.
| A．a;/ | B．the;a | C．/;the | D．the;the |
—Shall I lock the lab now before I go home?
—______.I’ll check it myself later.
| A．Go ahead | B．No problem |
| C．No hurry | D．Don’t bother |
.—The head teacher said we had only three days to finish the project.
—Don’t worry.We have already ____ two thirds of it.
| A．taken over | B．got through |
| C．made up | D．given away |