—Is there anything wrong with you, Jake? You look so pale.
—I feel very tired.I on this boring paper every day so far this month.
A. work
B. have been working
C. had been working
D. am working
网友回答
A. work
(答案→)B. have been working
C. had been working
D. am working
解析:可联系答.案.网客服索取。