People under stress ______ express their full range of potential.[ ]

Don’t worry about him, He is _____ to drive a car.

The research project has only been under way for three months,so it’s too early to___ its success. [ ]

This new English-English dictionary is useful for me. ______, I’ll buy it.

Oh, that’s just my missing pen Where on earth was it?— It off the table into the corner.[ ]