This is the most beautiful park I have _____ visited.
I don’t like fruits. Please take the _______ away.
My brother plays ______ basketball well but he doesn’t play _______ piano well.
Which of the following is not a natural disaster?
The old man knows the number of the birds here by ________ once a year.
I like shopping in Xinjiekou,________ I don’t like the busv tramc there.It’s very hard for buses to move.