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

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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

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
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

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
D
(经过努力后)做成某事用 be able to