---The window must have taken you quite a lot of time that day.
--- You are right. They ________ for weeks.
| A．haven’t been cleaned | B．hadn’t been cleaned |
| C．didn’t’ clean | D．haven’t cleaned |
Shanghai is the first city in the world ____a high-speed maglev train, from the city to Pudong Airport.
| A．to build | B．to be built | C．to have built | D．to have been built |
——Are you content with her lecture?
——Nowhere near that. It ____.
| A．may have been good | B．couldn’t have been worse | C．can’t be better | D．must be better |
A British man who ____ to play practical jokes ____ his own humorous art work in four major New York museums over the last two weeks.
| A．liked; has secretly hung | B．likes; has secretly hung |
| C．had liked; secretly hung | D．has liked; secretly hung |
I spent the whole day repairing the motorbike. The work was ____ simple.
| A．nothing but | B．anything but | C．something of | D．all except |
——Did your classmate accept your invitation?
——No, he ____ refused.
| A．as far as | B．as well as | C．as soon as | D．as good as |