—I went to see you yesterday evening. But you weren’t in. Where were you then? —I_____ a walk by the lake with my husband.
________ the traffic jam, he wasn’t late for class.
The famous doctor is going to operate ________ this injured boy.
________ class went to the Great Wall during the holiday.
Anny wants a room ________ his own. A.of C.on C.for D.to
He expects ________ to Tibet for traveling.