题目内容
并列复合句
Feather falls slowly ________ stone falls much faster．
－Why didn’t you call me up last night?
－I phoned you ________ I couldn’t get through at all．
His new book will come out next month, ________ I’m eager to read it．
________ she leaves the house, or I will call the policeman．
The day must break now, ________ the birds are singing now．
