九年级英语参考答案
1-10 BACD A BDBCD
11-14 DBDA
15-18 ABAC
19-22 ABDD
23-26 BDCB
27-30 DAEC
31.In Vietnam.
32. He used a rope system. / By using a rope system.
33. He saw many stalactites, a natural sandbar and a green lake.
34.Because he not only enjoyed the natural wonder but also found the amazing willpower in himself. The trip made him braver and helped him grow as a person. （酌情赋分）
35-44 wrote , a , to follow, their, on, separately, problems, funny, though, can’t
