31/F⇒southern Vietnam.
32/F⇒100km/h.
33/T
34/F⇒Myanmar,Indonesia,Malaysia,Cambodia,Vietnam,Thailand.
35/B
36/C
37/D
38/A
39/If the weather wasn't bad,we'd had went hiking in the mountains.
40/How high were the waves in Japan Tsunami 2011?
41/Specific regions will be affected in different ways by global warming.
42/The Hawaii volcano hasn't erupted for 2 years.