en stop can be a very frightening experience, _________ if you are travelling at high speed.

She was_______ to find the book she had looked forward to had been sold out. [ ]

The sweater is very nice. I’ll take it.—But you must _________first. I think it is a little large for you.

_________ go to the theatre together with me — Good idea!

The data shows _______ successful people have in common is ______ they have perseverance.[ ]