--____ you come to my birthday party tomorrow, Robert? --I’m afraid not. I have to study for my exam.
Liza speaks English very well,_______she doesn’t know Chinese.
There are _______ students in our class, twenty-two boys and eighteen girls.
—What’s this in English??—It’s _______ orange.
—Can she play the guitar?—No, she_______. It’s too hard for her.
I can’t tell when the house was built _______, but it must be very old.