1 . 他一定以为我在开玩笑。
He _________ I was joking.

2 . 你很熟悉这个城市，你一定在这里待了很长时间。(must)
You are very familiar with the city; you ________ here for a long time.

3 . You_______________(一定有过一些时刻) when you were disappointed. （“must have done sth ”意为“一定做过某事”）

4 . Tom didn’t respond to any of my calls. Something ____________________________ to him.  
汤姆没接我的电话。他一定是出什么事了。

5 . 他肯定是受到了惩罚，因为他今天不高兴。
He __________________for he is upset today .

6 . 我相信他肯定遇到意外事件了，否则他会按时到的。(must have done)
I believe ______; otherwise he would have arrived on time.

7 . 汤姆昨晚一定熬夜到很晚。他是那么困以至于刚才我们在一起唱歌的时候他睡着了。
Tom________ last night. He was________ he fell asleep when we sang a song together just now. (must)

8 . 你一定有过失望的时刻。如果有，你是如何应对他们的？
You must ________.

9 . The letters were also beautifully illustrated – each ________ its true author, Tolkien, a long time to complete.
信里还配有精美的插图——它们真正的作者托尔金一定花了很长时间去完成每一幅画作。

10 . 路是湿的。昨晚一定下雨了。(must have done)
The road is wet. ________ .