【C6】
A．payable
B．useful
C．valuable
D．acceptable
请帮忙给出正确答案和分析，谢谢！
A．goodB．usefulC．wrongD．handy
A．realB．modernC．worthyD．valuable
A．flewB．droveC．worthyD．valuable
【C9】A．evaluableB．validC．availableD．valuable
Keep this reference book; it may come in ______ one day.[2008]A．handyB．usefulC．convenientD
【C4】A．deservingB．worthC．worthyD．valuable
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