问题

The window must have taken you quite a lot of time that day— You are rightThey ________ for weeks

A:haven’t been cleaned
B:hadn’t been cleaned
C:didn’t’ clean
D:haven’t cleaned

正确答案是：

同类题型

Mary was listening to music while she _________ to school.

There being no witness on the spot, thepolice were delayed by the _____ of information about the crime.

This tree is ________ of the two.

The latest edition of Harry Porter has been a best-seller for 3 weeks_______[ ]

Wow! Your skirt looks so nice! —__________. It is my mother’s design.