If you don’t want to fall behind others, you must _____ current events.[ ]

. Do you think it ______ to attend the summer training courses run by the Sunday school?

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

On a rainy day I was driving north through Vermont, ______ I noticed a young man holding up a sign _____ “Boston”.

He kept a little notebook, in which _______ the names and addresses of his fiends.