Heavy smog blankets Beijing． ,city authorities start using its new smog warning system．
| A．In turn | B．In time |
| C．In response | D．In return |
We expressed the hope________ they would come and visit our hometown again.
| A．which | B．that | C．why | D．how |
Charlie Chaplin was loved by all who watched the film for his determination _____
overcoming difficulties.
| A．to | B．with | C．in | D．on |
Although I can walk about, there is still a ____ pain in my leg.
| A．weak | B．soft | C．strong | D．slight |
In ______, the northerners are keen on dumplings while the southerners are fond of rice.
| A．common | B．total | C．general | D．particular |
______ is obvious ______he has finished his work.
| A．What; that | B．That; that | C．It; that | D．It; what |