1. The proportion of men to women in the population ______ so that there are now fewer women and more men.
A. changed
B. change
C. have been changed
D. has changed
2. His childhood lacked the harmony that was ______ of a happy family.
A. typical
B. short
C. composed
D. economical
3. Some people think language lessons should be ______ to very young children because they learn new languages so fast.
A. available
B. equivalent
C. opposite
D. accustomed
4. Having a balanced diet is of great importance to our health; however, enough rest is ______ important.
A. excessively
B. properly
C. equally
D. generously
5. The board of the company has decided to ______ its operations to include all aspects of the clothing business.
A. multiply
B. lengthen
C. expand
D. stretch
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