I’m sorry I delayed_________ your letter because I have been quite busy these days.

May I take your order, sir-I’d like two _____ ,please.

32—Do you think the weather will be all right this summer?—No, _______ we’re luckyThe newspaper says it’ll be very hot anyway

I can’t______what has happened to the vegetables,for they were freshly picked this morning.

It’s hard _______ us ____ finish the work before five o’clock.