1.while → when
2.took → take
3.carried → took
4.smooth → smoothly
5.去掉been
6.and → but
7.by → in
8.get → got
9.before → after
10.had和high中间加入a
1.while → when
2.took → take
3.carried → took
4.smooth → smoothly
5.去掉been
6.and → but
7.by → in
8.get → got
9.before → after
10.had和high中间加入a