21. When I stayed in the countryside, I enjoyed ____ leisurely walk in the fields, and felt ____ warmth of the sun on my face.
A. / ; the B. a ; a C. / ; a D. a ; the
22. To improve the quality of our products, we ask ____ has used them for suggestions.
A. anyone B. who C. no matter who D. whoever
23. I arrived late and missed the flight. I ____ the traffic to be so heavy.
A. hadn’t expected B. haven’t expected
C. wouldn’t expect D. was expected
