Mary is so quiet a girl that she seldom speaks in public places unless _____ to.

You know Mr. Green has been ill for days?— Yes, I wonder if he is ______ better now.

Mary and Gina are my cousins. _____father works in Dongfeng Company.

Our holiday cost a lot of money-Did it?Well,that doesn’t matteryou enjoyed yourselves[ ]

.I think ______ quite difficult _______ all the tasks in time.