33．A big earthquake struck southern Haiti，knocking down buildings and power lines and causing__________ Its ambassador to the United States called a catastrophe．
| A．what | B．which | C．what | D．Why |
Some buildings built in the past _______ down and new ones are being built there.
| A．will be pulled | B．had been pulled | C．have been pulled | D．are pulling |
Summer is _______ good time for swimming, so you can find a good coach to help you in _______ summer of 2010.
| A．a; the | B．/; / | C．a; / | D．/;the |
It rained for two weeks, completely ________ our holiday.
| A．ruined | B．ruin | C．to ruin | D．ruining |
I don’t think it is teachers who ________ for giving students too much pressure.
| A．are to blame | B．are going to blame | C．are to be blamed | D．should blame |
Much new high technology has been introduced from America, ________ a great increase in the production of the company.
| A．resulting in | B．having led to | C．contributed to | D．caused |