
he could have been a doctor
Hecouldhavebeenadoctor20yearsago,buthe______tobeateacher.()A.choseB.hadchosenC.hascho...
He could have been a doctor 20 years ago,but he ______ to be a teacher.( )
A. chose
B. had chosen
C. has chosen
D. chooses 展开
A. chose
B. had chosen
C. has chosen
D. chooses 展开
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