Many teens don’t get enough sleep because they have too much homework, which _______ them up at night.

To do some voluntary work for the 2nd YouthOlympic Games is ______ excellent chance for us to serve our hometown—Nanjing.

_______ the students_______ their teacher know about the four people.

How old is your daughter—______. We had a surprise party for her ______ birthday last Saturday.

_____________. —I’m fine. Think you.