—Our class will have a party the evening of June 30th. Would you like to come?—Yes, I'd love to, but I'm going to visit my grandparents in Dalian.A. in B. on C. at
We ____ here two hours ago . We____ here for two hours .
He has a friend who ____ the piano very well .
I _____ singing to dancing .
“Help ____ to some fish .” Mrs. Smith said to the children.
That is a watch of ____ .