21.C, 22.A, 23.D, 24.B, 25.B, 26.D, 27.C, 28.C, 29.C, 30.B
31. Lăng Cô Bay is famous for its wonderful beaches.
32. What do we need to bring for our camping trip.
33. It take five hours to get to Sapa by bus.
31 Lăng Cô Bay is famous for its wonderful beaches
32 What do we need to bring for our camping trip?
33 It takes five hours to get to Sapa
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