一Did you have difficulty finding that book?一Not really.The librarian had given us good directions and we________ find it. A.had to B.have to C.might D.were able to
问题描述:
一Did you have difficulty finding that book?一Not really.The librarian had given us good directions and we________ find it. A.had to B.have to C.might D.were able to
答
D
(经过努力后)做成某事用 be able to