—Who’s singing in the garden?—It _____be Mr. Brown. He always practices singing at this time.A. must B. can’t C. need
Hurry up, _____ you won’t catch the early bus.
She _______ when I went to see her.
We won’t go to the Great Wall until the rain _______.
I will give the message to him __________he comes back.
We won’t go to the Great Wall if it ___________ the day after tomorrow.