Looking back，we have reasons to believe that ___more prosperous and stronger China will surely make new contributions to _____civilization of mankind．
| A．a；a | B．a；the | C．the；the | D．the；a |
—George, ____ you sing so loudly at such a late hour?
—I am terribly sorry．
| A．will | B．may | C．must | D．shall |
All the drivers have been warned that driving after drinking shall ____ serious accidents．
| A．bring up | B．bring back | C．bring in | D．bring about |
Depression is the leading cause of suicide, ____ in turn is the third leading cause of death among 15 to 24 year olds in the United States．
| A．who | B．which | C．that | D．what |
Everyone agrees that the Philippine police ____for the tragedy that Hong Kong tourists were killed．
| A．are to blame | B．are to be blamed |
| C．are being blamed | D．have blamed |
In ___ year 751, the Chinese traveler Du Huan was taken ___ prisoner by the Arabic army．
| A．a, the | B．/, the | C．the, a | D．the,/ |