Who’s that?—My sister. ______ works in a factory.

I don’t know the homework ______ today. [ ]

Yesterday I lent a book him.

The English exam is not difficult, is it?–________. Even Tom ________ to the top students failed in it.

We’ll be back for our school’s _____ anniversary ceremony(周年庆典). –I see. That means you’ll have a get-together with your classmates in ___ years.