Tom caught several fish after three hours, and only then ______ that the secret of success was patience.
| A．he realized | B．did he realize |
| C．he had realized | D．had he realized |
I told Sally how to get here, but perhaps I _______ for her.
| A．had to write it out | B．must have written it out |
| C．should have written it out | D．ought to write it out |
The old house, in front of ________ there is an apple tree, is ________ I used to live.
| A．that, the place | B．it, the place | C．which, where | D．what, where |
She took her son, ran out of the house, ________ him in the car and drove quickly to the nearest doctor’s office.
| A．put | B．to put | C．putting | D．having put |
You should put on the notices ________ all the people may see them.
| A．where | B．in which | C．at | D．for them |
The little time we have together we try ________ wisely.
| A．spending it | B．to spend it | C．to spend | D．spending that |