factory workers have to work very hard, ____.
A. farmers do so
B. farmers work so
C. so hard farmers
D. so do farmers
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rarely ____ such a silly thing.
A. have i heard of
B. i have heard of
C. have i been heard of
D. i have been heard of
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
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
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