The plane takes off at 6:00 p.m. So I have to arrive at the airport ________ 5:30 p.m. at the latest.A after B. since C. until D. by
It is the first time that I ______________ such a beautiful scene.
Do you know that I have trouble __________ the work?
Mr. White ______ from heart trouble, and he takes some medicine with him.
______ the bikes are too old to ride. I’ll have got to get them ______.
—______ Emily is in such a hurry? —I don’t know. She might run to catch the bus.