— Is Jim coming by train?  — I’m not sure. He_____ drive his car.

He ______ sleep, although he tried to, when he got on such a hunt for an idea until he had caught it.

Just because Tom has made some mistakes, _____you follow that he is a bad boy? 

He______ his work, otherwise, he wouldn’t be enjoying himself by the seaside.

The man over there _________ be over fifty. He looks so young.