6．A．Two weeks ago． B．Next week． C．Since two weeks ago·
7．A．OK，let's go． B．Yes，I’d love to． C．Coffee
8．A．Never mind． B．It's my pleasure． C．It's very kind of you．
9．A．Sorry,1 won't B．It doesn't matter． C．Certainly,1 will·
10．A．Yes，1 will． B．No，I didn't． C．No，I haven't．
