—Is this Mr White's office, Mary?
—Yes, ________.
| A．all right | B．it doesn't matter |
| C．after you | D．help yourself |
It is the third time that he ________ the first prize in the match.
| A．wins | B．has won | C．won | D．to win |
John asked his mom ________.
| A．where did she put his coat | B．where she put his coat |
| C．did she put his coat where | D．where was she putting his coat |
The bus hit the huge stone by the road heavily _________ he could stop it.
A. after B. before C since D. until
____________ to do the repair, and what you need is only a hammer and some nails.
| A．It is hard | B．That is easy | C．That is hard | D．It is easy |
They’re not playing baseball today ___________ the rain.
| A．because | B．as | C．since | D．because of |