As it only ( ) a small quantity, we hope you will have no difficulty in setting this matter.<br />A. involves <br>B.involved<br>C. has involved<br>D. involving

As it only ( ) a small quantity, we hope you will have no difficulty in setting this matter.
A. involves
B.involved
C. has involved
D. involving

出自：国家开放大学英语语法

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