–Tom, you didn’t come to my party last night?
– I ________, but my mom hurt her back and I had to look after her.
| A．had to | B．didn’t | C．wouldn’t | D．was going to |
Their school looks quite different from _______ ten years ago.
| A．what it was | B．that it was | C．what was it | D．that was it |
We must try our best to stop pollution ______ a low-carbon(低碳)life.
| A．from living | B．to live | C．living | D．live |
–I think honesty is the most important thing in doing everything.
–__________ .
| A．All right | B．Never mind | C．I think so, too | D．Yes, please |
Four hundred dollars for just a pair of shoes? You ______ be joking!
| A．may | B．can | C．can’t | D．must |