老年人近期出现精索静脉曲张，可能原因为（）
A.肾结核
B.睾丸肿瘤
C.肾积水
D.肾癌
E.肾孟巨大结石
参考答案：D
I don't think this watch ______ as much as the one you ______ last time.[ ]
A. spends; paid
B. takes; spent
C. pays; cost
D. costs; paid for
请写出best 的比较级和原级。
best ______ ______ ______
