问题
选择题
Billy is a nice boy . he knows a lot , but he never ________.
A． shows off
B． picks up
C．falls off
D． looks up
答案
答案：A
题目分析：句意：比利是个好男孩。他知道很多，但他从不炫耀。shows off使突出; 炫耀，卖弄; picks up捡起，拾起，接电话；falls off减少; 跌落；looks up仰望，在字典、参考书中查找。所以选A。