每日一练:职称英语理工类每日一练(2015-5-11)
【单选题】
I am very grateful to you for your assistance.
A.helpful
B.hopeful
C.pitiful
D.thankful
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每日一练:职称英语理工类每日一练(2015-5-11)
【单选题】
I am very grateful to you for your assistance.
A.helpful
B.hopeful
C.pitiful
D.thankful
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