World No Smoking Day is ________ May 31. A. in B. on C. at
— What are you going to___ when you ___ up?—I am going to be a scientist.A. do, grew B. does, grow C. be, grow
—I often saw you____basketball during the summer holidays.—Yes, you are right.A. playing B. play C. to play
—The food here is very nice. Thank you for inviting me.— _____ I’m glad you enjoyed it.
He made up his mind to devote his life _____ pollution ______ happily.
The players are passing the football from one to _____ in the football field.