At the foot of the hill, Jim ______ his bike and began to push it.?xml:namespace>
A. got away
B. got off
C. got on
D. got up
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Studies will be needed to see if the medicine has any ______ on the disease.?xml:namespace>
A. wealth
B. effect
C. price
D. market
Something is wrong ______ my radio. Can you help fix it ??xml:namespace>
A. for
B. of
C. on
D. with
Many artists find it hard to ______ a living from art alone.?xml:namespace>
A. do
B. make
C. have
D. take?xml:namespace>
CH3CH=CH2 + Cl2 + H2O 的主要产物为
A. CH3CHClCH2Cl + CH3CHClCH2OH
B. CH3CHOHCH2Cl + CH3CHClCH2Cl
CH3CHClCH3+ CH3CHClCH2OH
D. CH3CHClCH2Cl
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