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单选题
Drive slowly, Mary. ______ is something ahead on the road.
A
It
B
This
C
That
D
There
参考答案
参考解析
解析：
考查固定句型。句意：Mary，开慢一点，有东西挡在路前面。there be句型表示“某地有某物”。ahead在（某人或某物）前。因此D项正确。
考查固定句型。句意：Mary，开慢一点，有东西挡在路前面。there be句型表示“某地有某物”。ahead在（某人或某物）前。因此D项正确。
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