5. _______we keep our hearts open, we can experience the happiness friendship brings us.
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6.-Why don't you like fishing?-Fishing is a hobby_______ needs much patience, but I'm not patient at all.
A. who
B. that
C. what
7.-Hi, Tony! Do you know_______?-Yes, there is a coffee shop at the comer of the street.
A. when I can get a cup of caffee
B. wherecan I get a cup of coffee
C. where I can get a cup of coffee
8, "Underground"is the only word in the English langunge_______ begins and ends with the letters"und".
A. .what
B. that
C. who
9. He's not a perfect child. He sometimes talks back_______ his parents talk with him.
A. if
B. before
C. when