______ Tom be in his office so late at night ?

Excuse me, but I don’t think you can take photos here.— Sorry. I _______ this is no-photo zone.（地区）

You look unhappy . What’s wrong ?—I find ____ difficult ______on well with my classmates

________ old man behind Mary is ________ university teacher.

Is your aunt?－No. is very heavy(很胖).