你是Jack, 五年后再次来到这个城市，发现它变化很大，如图所示。你给朋友Mary 发电子邮件，告诉她这里的变化。信的开头已为你写好。
注意：1. 字数: 约100字.
2. 词汇: 立交桥. overpass.
Dear Mary,
The city has changed a lot in the past five years.
I told you that you shouldn't waste your time playing the computer games,_____________?
| A．didn't I | B．did I | C．should you | D．shouldn't you |
If human beings had been a bit less greedy and cruel, more birds and animals _______dying out.
| A．ought to avoid | B．could have been avoided |
| C．should have avoided | D．might have avoided |
With a lot of difficult problems____________, the manager felt worried all the time.
| A．to settle | B．settling |
| C．settled | D．being settled |
--Was Tom there when you arrived?
--Yes, but he___________ home soon afterwards.
| A．had gone | B．has gone | C．is | D．went |
—Look at these tracks. It __________ be a wolf.
—It needn't be. It ___________ be a fox.
| A．must; could | B．may; might |
| C．need; must | D．could; need |