Alice fixed her eyes upon Bob, there was an expression __ that he could not understand.
Considering his health, I advise him to ______ an hour or two each day to work out.
——Will you come to my office when you your work? ——Sure.
Tom, you’ve got a "D" in chemistry.____?—Well, I find the subject hard and I think I’ll drop it for history next term.
for the timely investment from the general public, our company would not be developing so fast as it is.
The project is one of the many government programmers improving the for the poorest increased ability to learn.