Ⅰ、 1-5 BDBBB
6-10 DCBDC
11-15 ACACA
16-20 ABDDD
Ⅱ、 21-25 CABBD
26-30 ACCDA
Ⅲ、 31-35 DCGEB
Ⅳ、36-40 BBACD
41-45 ABABC
46、 My father and I used to climb the mountains.
47、 You should have goals like climbing the mountain.
48、 Yes, he was very busy.
49、 At the top of the mountain.
50、Hope and confidence.
Ⅴ、51、 ours
52、 tie
53、 ourselves
54、 row
55、pool
Ⅵ、One possible version:
Great changes have taken place in our studies since our school began to carry on exploring learning strategies. In the past, teachers kept explaining the know ledge points in class. We students just listened and took some notes. So we didn't have enough time to think about problems by ourselves. Besides, we had to do much homework after class. But now teachers show the problems to us first, and then we students discuss them for a while in pairs or groups. We try to find out the ways of solving problems on our own, and we’ve learnt how to work with others. After class, we have different activities. For example, we can read books we like, go to library or surf the Internet for useful information and so on.
In a word, now we are the owners of our studies and we' re happy.