每日一练：职称英语考试理工类每日一练(2018/5/5)
【单选题】
I am very grateful to you for your assistance.
A.helpful
B.hopeful
C.pitiful
D.thankful
在下面提交答题后即可查看答案与试题解析
每日一练：职称英语考试理工类每日一练(2018/5/5)
【单选题】
I am very grateful to you for your assistance.
A.helpful
B.hopeful
C.pitiful
D.thankful
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