Dalian is well-known for its mild climate, but it________be very cold in winter.
It has been announced that all the students ______ put on the masks before going to school in case they are infected with SARS virus.
Some researchers are finding that daydreaming may be important to ______ mental health. Daydreaming, they say, is _____ good means of relaxation.
--- How long do you think it’ll be ______ I can go back to work?--- Well, you’ll be feeling better by next weekend.
I ______ to help you to do homework but I couldn’t spare any time. I ______ a composition last night and I’ll finish it tomorrow.
This dance is known _______ country music.A. perform by B to be performed with C. to be performed to D. being performed in