Question

 Old Henry _____ take his dog for a walk after supper．But these days he is too weak to do that.

        A. has to    B. is able to    C. used to    D. got used to

Answer 1

C

句意：老亨利过去晚饭后带着狗去散步，但这些天他太虚弱不能去啦。has to不得不；is able to 能；used to过去曾经做过；get used to 习惯于。根据句意，答案应选C。