C
2.3.6前者4.5.7.8后者
D
2.have to wash
3.have to eat out
4.mustn't drive
5.had to stand all way
6.don't have to take a taxi
7.must learn Putonghua
8.didn't have to wait
9.has to get up early
C
2.3.6前者4.5.7.8后者
D
2.have to wash
3.have to eat out
4.mustn't drive
5.had to stand all way
6.don't have to take a taxi
7.must learn Putonghua
8.didn't have to wait
9.has to get up early