你可能感兴趣的试题
to do; doing doing; doing doing ;to do to do ;to do
doing；to be done doing；doing to be done；to be done doing；being done
starts, was doing started, was doing was starting, was doing starts, were doing
what they were doing at that moment what were they doing at that moment how are they doing at that moment what they are doing at that moment
B.C.D.四个选项中选出一个可以填入空白处的最佳选项。 When the man downstairs knocked at the door, I _______. A. am doing housework was doing housework were doing housework am going to do housework
have done have been doing am always doing was always doing
what you were doing what you are doing what were you doing what are you doing
starts, was doing started, was doing was start, was doing starts, were doing
Whatever is worth doing at all That is worth doing at all What is worth doing at all Whatever is worth doing it at all
was doing had been doing has been doing is doing
doing ;to be done doing;doing to be done ;to be done doing ;being done
making; making doing; doing making; doing doing; making
what was she doing what is she doing what she was doing what she is doing
start doing to start doing starting doing started doing
do; doing am doing; do do; am doing am doing; am doing
what were they doing what they were doing what are they doing what they are doing
what are they doing that for why they are doing for why are they doing that what they are doing that for
was, doing are, doing is, doing were, doing
did was doing has been doing had been doing
what are they doing that for why they are doing for why are they doing that what they are doing that for
湘公网安备 43130202000226号