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

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

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

—George, ___    _ you sing so loudly at such a late hour?

         —I am terribly sorry．

         A．will                   B．may                   C．must                      D．shall

The truly homeless are the rich who __     _ their home into a hotel hall．

         A．will turn                                            B．turned             

         C．are turning                                          D．have turned

___        is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times．

         A．As                       B．It                          C．What                   D．That

___       three times in a row, the boxer decided to make a fourth attempt, though．

         A．Having defeated                                    B．To have defeated

         C．Having been defeated                             D．To defeat

Not until they left school ___      how much their teachers loved them and helped them．

         A．they realized                              B．did they realize

         C．they had realized                                D．had they realized

It is hard to imagine what I ___       today if I hadn't been admitted to Nankai Middle School 15 years ago.

         A．would have done                                      B．will do           

         C．am doing                                              D．would be doing

One in five humans ___       access to safe drinking water by 2080．

         A．is said lacking                                           B．is said to lack

         C．are said to lack                                   D．are said lacking