—Look at the boy running on the ground. Is it Davis?—It ______ be him. I saw him go to the teacher’s office just now.
----Why do you always sleep ________? ----Because I’m afraid of the dark.
China is larger than _________ in Africa.
Mr. Li asks us to remember that __________ careful we are, _________ mistakes we will make.
----Would you like to go to the amusement park? ----If Jack does, __________.
Because of the bad weather, we have to _________ the meeting till next week.