问题
选择题
It's really very dangerous.One more step，________ the baby will fall into the well.
A．or
B．so
C．but
D．and
答案
答案：D
此句的句型结构为：祈使句＋and＋陈述句。并列连词and在此意为“那么”。One more step＝Take one more step。
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