That ball is very hard ________.

[　　]

A．to reach it
B．to reach
C．reach
D．reaching
答案：B
解析：

分析 根據(jù)本句的意思，應用的短語是be hard to do…。故C、D被排除；又因為句里的主語(that ball)在邏輯上為to reach的賓語，故其后不能用it，以避免用詞重復現(xiàn)象。所以，B是正確答案。


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