274.（10-11，江苏省盐城中学高二上期中） At last we found ourselves in a pleasant park with trees providing shade and _______ down to eat our picnic lunch.
A. sit B. sitting C. to sit D. sat
275.（10-11，江苏省盐城中学高二上期中） ______ to take time to relax, there is always someone telling us things we should be doing.
A. When trying B. To try C. When we try D. Trying
