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_______ in the fields on a March afternoon, he could feel the warmth of spring.

   A. To walk.        B. Walking       C. Walked          D. Having walked

_______ in the fields on a March afternoon, he could feel the warmth of spring.

A. To walk.        B. Walking       C. Walked          D. Having walked

_______ in the fields on a March afternoon, he could feel the warmth of spring.

A. To walk.        B. Walking       C. Walked          D. Having walked

_______ in the fields on a March afternoon, he could feel the warmth of spring.

__________ in the fields on a March afternoon, he could feel the warmth of spring.

__________ in the fields on a March afternoon, he could feel the warmth of spring.

A．To walk           B．Walking           C．Walked           D．Having walked

33.   ________ in the fields on a March afternoon, he could feel the warmth of spring.

_______ in the fields on a March afternoon, he could feel the warmth of spring.

____ in the fields on a March afternoon, he could feel the warmth of spring.

A. Walking         B. To walk           C. Walked                 D. Having walked 

________ in the fields on a March afternoon, he could feel the warmth of spring.

A. To walk.        　　 B. Walking       　 C. Walked          　　 D. Having walked