【2015·重庆】Like ancient sailors, birds can find their way____ the sun and the stars.
| A．used | B．having used | C．using | D．use |
He doesn’t like to be interrupted if he_______ .
| A．speaks | B．will speak | C．is speaking | D．spoke |
—What was the party like?
—Wonderful. It’s years_______I enjoyed myself so much.
| A．after | B．before | C．when | D．since |
You will be late_______you leave immediately.
| A．until | B．if | C．or | D．unless |
We shall go to help them_______we are free.
| A．whenever | B．whatever | C．wherever | D．however |
________the day went on, the weather turned out to be fine.
| A．Which | B．Since | C．While | D．As |