My sister______ the League last month and she has decided to ______ the activity to help the aged next week.
----Have you seen____pen﹖I left it here this morning. -----Is it____black one﹖I think I saw it somewhere.
The news has spread all over the country ____ the spaceship succeeded in returning to the earth.
____ he works hard, I don’t mind when he finishes the experiment.
____, he does not know the answer.
We were ____ to go out for a camp ____ it began to rain.