右边漫画《一万个零抵不上一个一》的哲学寓意告诉我们（）
A.现实高于理想
B.苦干胜于巧干
C.眼高不能手低
D.求精不能贪多
参考答案：C
When I dropped in, Dr Smith _____, so we only had time for a few words. [ ]
A. just left
B. was just leaving
C. has just left
D. had just left
委托第三方调查的信息可能很有价值，但缺点是费用太高。
