单项选择题

You are too rigid: you must learn to change your plans when the situation ______ it.

A．calls on
B．calls for
C．calls forth
D．calls in
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单项选择题
Mrs. Mary wore a string of beads around her neck.
A．small pieces of gold
B．small balls of precious stones
C．small pieces of wood
D．small balls of glass
单项选择题
If your expenses ______ your income, you will be in debt.
A．surpass
B．exceed
C．survive
D．pass
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