Sat grammar questions,second post

问题描述:

Sat grammar questions,second post
1) In the 100-yard relay our team impressed the crowed,with each "of the members shaving" several seconds off her own best time.
a) of the members shaving
b) of the members had shaved
answer is A,why not
Pls!Somebody tells me when I should use "ing" form

Why?Its just grammar questions,as you said,peples used to it.
If you chose b),this sentance has two verb.[shaving] here is uses as a prep.那如果with變成了which是不是就可以選B? Thx for answering my question!应该是who吧