一.I haven't heard from him___he went to america.
二.He won't be here __he is invited.
三.He will not go to the cinema __he is very busy.
四.We found the key she had left it.
五.We found the books two days __he had gone away .
六.We had no sooner got to the station __the train left.
七.He is explaining clearly__they could understand.
八.Do not leave the room ___yor have finished the test.
九.shi sang__shi went along.
We found the key_ she had left it.