问题

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

正确答案是：

同类题型

It’s difficult _______ me _________ my diet.

Don’t be late next time!—_______

It’s really hot ________ January in Harbin nowBetter take off your coat

Do you need help _______ your Maths homework

D0 you consider it any good__________thetruck again