Peter’s father asked him to spend his time on something______researching into instead of playing all the time.

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问题 Peter’s father asked him to spend his time on something______researching into instead of playing all the time.

选项 A、worthy
B、valuable
C、worth
D、precious

答案C

解析 A项worthy“值得的”,其用法是worthy of doing sth.或worthy to be done;B项valuable“有价值的”:C项worth意为“值……的”,后面一般接动名词表示的主动形式表达被动含义,意为“值得做”;D项previous“宝贵的”。因此C符合题意。
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