希望和他人订立合同的意思表示是指（）
A.要约
B.要约邀请
C.承诺
D.邀约撤回
参考答案：A
— Why do you look so worried?
— My MacBook Pro broke down and my paper________unfinished since.[ ]
A. was left
B. has left
C. left
D. has been left
