not until i went to america ____ what kind of a country she is.
A. did i know
B. i know
C. i didn’t know
D. i could know
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so instructive ____ the student wanted to see it again.
A. was the film
B. it was the film
C. the film was
D. the film it was
____ a postgraduate, i would at least master two foreign languages.
A. should i become
B. were i to become
C. had i become
D. i should become
seldom ____ any mistakes during my past five years of teaching in this university.
A. would i make
B. i did make
C. should i make
D. did i make
____ she would have avoided the accident.
A. she was more careful
B. if she was more careful
C. had she been more careful
D. she had been more careful
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