The old man lives alone on an island, and his home is not accessible ______ by boat

Is John coming by train —He should,but he ________ not. He likes driving his car.

There is a new problem involved in the popularity of private cars ____________ road conditions need ____________.

It was July l,1997________saw the return of Hong Kong to the motherland. [ ]

When shall we go to watch the basketball match in the sports centre— we the work tomorrow.