选择方框中词的适当形式填空。（5分）

小题1:His face seems very ______ to me, but I can’t recognize him.

小题2:The meeting ______ for 3 hours and many people got bored.

小题3:The doctor asked the man to eat ______ because his stomach was seriously bad.

小题4:It’s _______ to throw away the things that can be reused.

小题5:He runs as ______ as possible to catch the bus.

商品经济产生和存在的前提条件和一般基础是( )。

A．自然分工
B．社会分工
C．私有制
D．公有制