On Sundays there were a lot of children playing in the park, _______ parents were sitting together joking.
| A．their | B．whose | C．which | D．that |
Although he was disabled, he tried to leadas possible.
| A．as normal a life | B．so normal a life | C．as a normal life | D．so a normal life |
Almost everyone has his own strengths and weaknesses. It is _______ others are weak that maybe you have a great advantage.
| A．although | B．unless | C．because | D．where |
I had just given up hope of going to college _______word came that I had been admitted to a famous British University.
| A．when | B．while | C．so | D．until |
Cars play an important role in modern life, but they ______ also cause many problems like air pollution.
| A．should | B．can | C．must | D．will |
Mr. Lee, who ________ as a carpenter for over 10 years, is now a very famous statesman in this country.
| A．has worked | B．had worked | C．worked | D．works |