4 . I ________ speak Arabic fluently when I was a child and lived in Morocco. But now, I ________ just say a few things in the language. (用适当的词填空)

6 . 鲜花可以使沉闷的房间恢复生气。(bring)(汉译英)

7 . 我原以为我能说服我的父母允许我按照自己的意愿花钱。
I thought ________________ as I wished.

9 . 选词填空。
1. My mother is ill, so I ________(have to/ must)stay home to look after her.
2. He ________(can’t/ mustn’t)be Tom. Tom has gone to London, you know.
3. It’s dark outside. Besides, it’s raining heavily. So, you ________(had better/ might)go home with me.
4. In today’s information age, the loss of data ________(can/must)cause serious problems for a company.
5. It’s strange that he ________(should/ must)have taken the books without the owner’s permission.
6. Samuel, the tallest boy in our class, ________(can/should)easily reach the books on the top shelf.
7. My room is in a mess, but I ________(needn’t/ shouldn’t)clean it before I go out tonight. I can do it in the morning.

10 . 有了手机软件，人们不仅能方便地订外卖、订酒店，还能远程做很多事情，例如监督家中安全，命令机器人做清洁方面的家务。(oversee) （汉译英）