—It __________. It can't write.
A：hand, hurt
B：leg, hurts
C：hand, hurts
⑴Can I have an apple, please? ____ A.Thank you.
⑵Do you like milk?____ B.Yes, I like grapes.
⑶Have some pears, please.____ C.OK.
⑷Do you like grapes?____ D.Sure.Here you are.
⑸Let's buy some milk.____ E.No, I don't like milk.
一个人用同样大小的、沿水平方向的力拉着木箱，分别在光滑和粗糙两种水平地面上前进相同的距离。关于拉力所做的功，下列说法中正确的是（ ）
