并列复合句

－Why didn’t you call me up last night?

－I phoned you ________ I couldn’t get through at all．

并列复合句

His new book will come out next month, ________ I’m eager to read it．

并列复合句

________ she leaves the house, or I will call the policeman．

并列复合句

The day must break now, ________ the birds are singing now．

并列复合句

Feather falls slowly ________ stone falls much faster．