A.did but he didn’t listen | B.ought to and he wouldn’t listen |
C.ought to have; but he didn’t listen | D.should have but he hadn’t listened |
A.listened; have heard | B.have listened; hear |
C.am listening; hadn’t heard | D.was listening; couldn’t hear |
A.am helping | B.am going to help | C.am to help | D.will help |
A.is; went | B.was; goes | C.should be; go | D.was; go |
A.hadn’t seen | B.didn’t see | C.hasn’t seen | D.doesn’t see |
A.has introduced | B.was introduced | C.will introduce | D.is being introduced |
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