A.have | B.had | C.had had | D.will have |
A.could attend | B.will attend | C.attended | D.had attended |
A.gained | B.was gaining | C.has gained | D.had gained |
A.gave | B.gives | C.have been giving | D.are giving |
A.don’t realize | B.didn’t realize | C.haven’t realized | D.hadn’t realized |
A.succeeds | B.will succeed | C.is to succeed | D.is about to succeed |
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