—It’s very friendly ______ him to help me when I’m in trouble.
No one knows ____ in fifty years.
—What a beautiful sweater! How much did you _____for it? —198 yuan.
I ________ the film. I don’t want to see it again..
The singer has got a headache badly, she has to _______ singing.
He does not know ______ they will plant trees on Saturday or not.