We were about to go outing______ it began to snow heavily.
I am_____ building a new factory here. It will pollute the water here. [ ]
”It’s five forty-five”means(意思是)”It’s ___________.”
Every year a great number of foreign tourists pay a visit to _____ we Chinese call Heaven Lake.
Mr. Black, I find ______ difficult to play the piano well.—Oh, I think you just need to practice more