There is no doubt ______ man will conquer nature some day.
The organizers want to complete their plan ahead of _______ . So we must work harder.
---- John and I will celebrate our fortieth wedding anniversary next mouth.---- Oh, _______ !
—Tom, you shall not come to school late again.—Sure, Mr. Brown.
The new equipment, ____ the disabled, was put into the market last weekend.
If you hurry up, I think it quite ____for you to catch the flight, for there are still 50 minutes left.