Mr. Smith couldn’t open the door because his naughty boy _______ it from the inside
His illness _____ his absence.
You’ve been so kind to us that we will always be deeply _____.
—Mr. Green was born in China. —It’s no _____ he can speak Chinese so well.matter B. doubt C. wonder D. problem
The meeting was to have started at nine o’clock, but the chairman had not _____ by ten.
We have planted thousands of trees in recent years. This year _____ we’ve planted ten thousand trees.