Mr. George used to __________ a walk along the river after supper when he was in the countryside. Now he gets used to _________ a walk in the garden. A.take; taking B. taking; take C. take; take
A: Did you solve _ problem you were discussing at the meeting?
B: No, we didn't. It was _ difficult problem we had never met.
A. the, the B. a, a C. the, a