When the traffic light(交通信号灯)turn red,you should ______ .
—Is there a computer in your class?—No,there ________.A.is B.aren't C.isn't
We ________storybooks.A.read B.reads C.is reading
There ________a computer and some books.A.are B.is C.am
Can you go to a concert ________?A.with me B.and I C.to me
I have a ________.So I must see the dentist.A.toothache B.fever C.headache