As your instructor advised, you ought to spend your time on something______ researching into.

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问题 As your instructor advised, you ought to spend your time on something______ researching into.

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

答案B

解析 从意义上看,precious为"贵重的,珍贵的",其余三个词都是"有价值的",但从用法上看,只有worth后面接一ing形式,worthy接of。如:His courage was worthpraising.=His courage was worthy of praise."他的勇气值得赞扬。"
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