(1) We don't believe it because it is very (believe) .

用discover或invent的适当形式填空

(1) We that our luggage had been sto- len.

(2) 1 think the calculator was before the computer.

6. 科技以如此迅速的方式发展，真是令人难 以置信！

  technology has progressed in such a rapid way!

5. 我曾经去过的最有趣的博物馆是美国计算 机博物馆。

The most interesting museum   is the American Computer Museum.

4. 它真的很有趣，不是吗？

It's really interesting ,  ?

3. 今天，让我们去一个与众不同的地方吧。

Let's go  today.

2. “你曾经去过历史博物馆吗？”“不，我没去 过。”“我也没去过。”

—Have you ever been to a history museum?

—No ,  .

-- .

1. “你曾经去过科学博物馆吗？”“是的，我 去过。”

--    a science museum? 

—Yes, .

1. 去滑冰

2. 不同种类的

3. 鼓励某人做某事

4. have a great time

5. a couple of

() 5. —Bill hasn't finished reading Treasure Is- land yet. What about you?

--I've read it twice .

   A. just then   B. just now

   C. yet   D. already