—Can you tell me _____when the teacher came into the classroom?—Sorry,I don’t know.
Every year lots of trees ______to make our country more beautiful.
I’m ______hungry. Could I have something to eat?
-When will your brother return? –I will tell you as soon as he ___back.
Now, ________, I’m going to give you some advice on how to learn English.
–In the old days, most teenages had to work for the landlord(地主)in the field to helptheir families, because their families couldn’t education for them. -What a pity!