You should never base anything on a theory that ________

You should never base anything on a theory that _________ impractical in practice.

#86010

is proved

prove

proves

proved

推荐题目

Here _____a set of keys.The keys _____Bob’s.

#43754

is,are

are,is

is,is

are,are

Nine plus three _________ twelve.

#86106

makes

make

ismaking

aremaking

Now Tom with his classmates ________ football on the playground.

#86324

play

are playing

plays

is playing

Great Expectations ______ my favorite book, which ______ by Charles Dickens, and ______ as classic literature nowadays.

#86034

is; was written; is seen

are; are written; are seen

is; had been written; is seen

are; were written; is being seen

Mary is the only one of the girls who _____ often late for school.

#86189

are

comes

get

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