Public service ads, also PSAs, often _________ for free, _________ to educate people about health, safety or any other problem that affects public welfare.
| A．run; meant | B．are run; are meant |
| C．are run; mean | D．run; are meant |
—Can I drive on the free way, Mr．Green?
—You can when you____________ a bit more skilled．
| A．will get | B．are getting | C．will have got | D．get |
—Glad to meet you．
—____________
| A．So do I． | B．How are you? |
| C．How do you do? | D．The same to you． |
—How much is the T-shirt ___________?
—65 dollars．
| A．worth | B．cost | C．worthy | D．paid |
I've visited a lot of different places and stayed in lots of different hotels, but none of them___________ this one．
| A．makes | B．beats | C．compares | D．matches |
—Look at these tracks．It __________ be a wolf．
—It needn't be．It be a fox．
| A．must ; could | B．may ; might |
| C．need ; must | D．could ; need |