He studied hard and ____ pass the examination .
A . could able to B . could C . was able to D . ought
He studied hard and ____ pass the examination .
A . could able to B . could C . was able to D . ought
C。
be able to 含有“经过努力而完成某一动作”的意思,相当于 manage to do 或 succeed in doing,而 can 只“单纯地表示能力或可能”。