___is well known is that Africa had contacts with India and the Red Sea civilizations from the earliest times.
______ do you go online? -Sometimes. [ ]
A: _____is Mary?B: I think she is at home.
Must I hand in my homework now?—No,you__.You can hand it in tomorrow.
Do you know who took the students to the old people’s home, Tony?—Well, Mr. Smith _______.