31.-----She missed her train to London,____she didn"t seem to care. ---- Well, there is anotherl one in 15 minutes.
Yesterday the teachers and students held a grand meeting _________ the 60th anniversary of our school.
— I put him down for a well-educated man.—______ ?— I mean that he's a well-educated man.
The silence of the library is sometimes broken by a sudden cough or the sound of pages______.
Wang Pin is an advanced worker in our company. He _______ for four years in Yangzhou University.
When it______ air pollution, Beijing faces the three “C” s-----cars,coal and construction,which lead to Beijing's thick air pollution.