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When girls hit adolescence, their self-confidence begins to wane.
wax and wane
The moon waxes and wanes every month.
How animals evolve is the foundation of evolutionary biology.
It had rained for four consecutive days.
Schools tend to perpetuate the myth that boys are better at sport than girls.
Can you untangle these wires?
The problem took three hours to untangle.
a small bag in which women keep paper money
The rise in crime constitutes a threat to society.
Twelve months constitute a year.