Because of the bad weather, we had to ____ climbing the mountain.

Why are you in such a hurry, Mike —There ______ an NBA basketball game in ten minutes.

Look! The girl with long hair is drawing a picture. Is she Sandy— It ______ be her. I’m not sure.

set mother thought to herself, “If only I ______ what’s going on in my little boy’s head right now.”

Thanks so much for telling me the ways of learning English well.—________. Keep on and you’ll succeed.