You ............... take a lot of warm clothes when you go to Sapa in winter
A. Must. B. Mustn't. C. Can. D can't
16. Ba Be lake is the ................... Lake in Vietnam
A large. B larger. C. Largest D tallest
17. Remember....................... Warm clothes. It's very cold in Ha Noi in winter
A talking. B. Takes. C. To take. D. Take
18. How about...................... For a picnic this Sunday?
A. To go. B. Goes. C going. D go