.—__________ I hand in my report as soon as the class is over?—No, you needn’t.Anytime this week is okay.
Here is such a difficult text _____ none of us can understand. Here is such a difficult text _____ none of us can understand it.
—Which of these two dictionaries will you buy? —I'll buy _____ ,for the different uses.
I didn't know _____ you were getting on well with your work.
Mr Black _____ his wife to teach their child a lesson. So he did.
I took them _____ because I didn't know which was the best.