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Relative Pronoun
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I don't know ______ he solved the problem.
A
what
B
where
C
why
D
how
Answer:
D. how
Related Questions:
My sister ______ has gone to Australia.
This is the boy ........ had an accident.
This is the building ........ belongs to my friend.
This is the man _____ purse was lost in the bus.
I have found the book ........ i lost.
