1. The limits of a person’s intelligence, generally speaking, are
fixed at birth, but ________he reaches these limits will depend
on his environment.
A. where B. whether C. that D. why
2. Evidence has been found through years of study______
children’s early sleeping problems are likely to continue when
they grow up.
A. why B. how C. whether D. that
3. It is by no means clear______ the president can do to end the
strike.
A. how B.which C. that D. what
4. Jerry did not regret giving the comment but felt ______ he
could have expressed it differently.
A. why B. how C. that D. whether
5. We promise _____ attends the party a chance to have a photo
taken with the movie star.
A. who B. whom C. whoever
D. whomever
6. As many as five courses are provided, and you are free to
choose _____ suits you best.