在测定匀变速直线运动加速度的实验中，选定一条纸带如图所示，已知交变电流的频率f=50Hz。从0点开始，每5个点取一个计数点，其中0、1、2、3、4、5、6都为计数点。测得：x₁=1.85cm，x₂=3.04cm，x₃=4.25cm，x₄=5.48cm，x₅=6.68cm，x₆=7.90cm。

（1）在计时器打出计数点4时，小车的速度v₄=____________cm/s（结果保留3位有效数字）；

（2）加速度a=____________m/s²（结果保留3位有效数字）。

It was Sunday and there were so many people in the streets that he found it difficult

to _____ to the post office. [ ]

A. make his way

B. find his way

C. feel his way

D. lose his way