Turn off the tap please. The water .
| A．was wasted | B．wastes | C．is wasting | D．is wasted |
—Why are your hands so dirty?
—I________in the garden．
| A．was working | B．have worked | C．worked | D．have been working |
—Why not open the windows to let_____cool air in?
—I'd rather you didn't_____air in our town is terribly polluted．
A．a；The B／；The C．/；/ D．the：/
It is a rule in our school that no books______out unless you have a library card.
| A．must be taken | B．might take | C．can be taken | D．should be taken |
Naturally I will come to you for advice whenever I feel I need________.
| A．them | B．one | C．some | D．few |
Today，_____rapid transportation and communication, the whole word seems to be smaller．
A．regardless of B．in 
spite of C．instead of D because of