10，Stop to do sth
11，Seem to do something
12，Walk around the town
13，Help sb to do sth
14，Be busy doing sth
16，Be surprised to do sth
17，The best way to do sth
18，A 16 year old high school student
19，Less than 6 hours
热腾腾的解答喽
采纳后发答案。
10 stop to do sth
11 seem to do 12 walk around the town
13 help sb （to） do sth 14 be busy doing sth
16 be surprised to do sth
17 the best way to do sth 18 a sixteen-year-old senior high school student
19 less than six hours
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