—The middle-term examination is coming. I'm afraid I will fail.—______! I’m sure you can make it.
How did you ___ to paint the whole house in a week?
Black clouds had completely ___ the sun.
It was an unpleasant subject ____ we _____ for a long time.
It must have rained last night, ________ the ground is wet now.
The serious expression of the captain kept his crew _________.