You should keep those old jam bottles ----you never know ______ you might need them.
A. when B. how
C. what D. where
The news has spread all over the country ________ the spaceship succeeded in returning to the earth.
A. that B. which
C. whether D. what
13. Our bad living habits will destroy the earth. Only by changing ________we live can we save the earth.
A. that B. what
C. how D. where
10. She was so angry at ______ he was doing ________ she stayed up all night.
A. that; that B. that; which
C. what; that D. what; as
After three days' waiting, there was a little doubt in the mother's mind _______ the police could find her lost child.
A. how B. that
C. where D. whether
Nowadays people become more practical and buy only _______ they need.
A. where B. which
C. when D. what
