Hiking the trail to the peak _______ be dangerous if you are not well prepared for dramatic weather changes. You _______ research the route a little more before you attempt the ascent.
A. might / can
B. may / mustn't
C. can / should
D. must / needn't
might / can: có thể/ có thể
may / mustn't: có thể/ không được
can / should: có thể/ nên
must / needn't: phải/ không cần
=>Hiking the trail to the peak can be dangerous if you are not well prepared for dramatic weather changes. You should research the route a little more before you attempt the ascent.
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