Would you like to go to the concert with metonight–I’d love to, butof us two has tickets. Do you have some

_____ to do the work, I should do it some other day.

There was a________look on his face when he met with the________problem.

There were so many books in the shopping center, I didn’t know_______ .

My son, ___________ exercise every day. It’s good for your health.—OK.