单项选择题


Questions 13 to 15 are based on the conversation you have just heard.

A．Never lean forward.
B．Never lean backward.
C．Never lean away from the shore.
D．Never get out of the canoe.
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单项选择题
A．More than 14,000 acres.B．About 14,000 acres.C．More than 4,000 acres.D．About 4,000 acres.
A．More than 14,000 acres.
B．About 14,000 acres.
C．More than 4,000 acres.
D．About 4,000 acres.
单项选择题
A．Penguins are the smallest animals in Antarctica.B．Penguins are the best-known of Antarctic birds.C．Penguins can fly because they have strong wings.D．Penguins can only swim a little distance.
A．Penguins are the smallest animals in Antarctica.
B．Penguins are the best-known of Antarctic birds.
C．Penguins can fly because they have strong wings.
D．Penguins can only swim a little distance.
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