单选题
This reference book______again.
A、
is worth to read
B、
is worthy reading
C、
is worth being read
D、
is worth reading
【正确答案】
D
【答案解析】
[解题指要] 该题测试“be worth doing”句式。该用法含被动意味，相当于be worthy of being done或be worthy to be done。
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