. Emergency line operators must always ________calm and make sure that they get all the information they need to send help.
I’ll finish the job ____ I come across great difficulty.
My brother wants to work in the factory which _________ now.
He told me about thenews in avoice.
It is a paradox(自相矛盾) that ina rich country there should bemany poor people.
We are living in an agemany things are done on computer.