1.People in China paid much attention to a big problem:peopl
1.People in China paid much attention to a big problem:people ( ) (throw) away 27 million platic bags a day. (为什么用过去进行时?) 2.After the exams,we shall have ( ) holiday. A.two weeks B.two-week C.a two-week D a two week (为什么选C,而不选B呢?“两个星期”不是复数吗,为什么还要加a )