1 my sister could come as well
2 hard she works, she never seems to succeed
3 some has challenged his authority
4 Their second son was born did Lan and Hung decide to love to a bigger house
5 go out for a meal than staying at home
6 I think it is not worth asking
7 don't we go to visit
8 is impossible for me to
9 had difficulty finishing
10 seems to have developed amazingly