多人多声部演唱称为(____) 在齐唱中有一人单独演唱一个乐段或乐句称为(____)。
You can _____ some bottles of wine, or some chocolates, or a bunch of flowers.
— ___________________
— Once or twice a week.
A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.
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