1.C 最高级
2.D take steps采取措施
3.B have difficulty (in) doing sth.
4.C ought to have done本应该做某事
5.A sb. need to do
sth. need doing主动表被动,此时这两个need是一个实义动词.
1.C 最高级
2.D take steps采取措施
3.B have difficulty (in) doing sth.
4.C ought to have done本应该做某事
5.A sb. need to do
sth. need doing主动表被动,此时这两个need是一个实义动词.