--- When did your father come back last night?--- He didn’t come back _______ he finished all the work.
----Where does Simon come from?---- Tokyo, the capital of ________.
----Shall we go out for a picnic tomorrow? ---- ____________.
I’m so excited. I can’t __________ visit the Summer Palace.
Yesterday, Uncle Green arrived _____ Paris.
Some people are walking _______ the bridge and some boats are going _______ the bridge.