一个英语语法题不懂I remember,_____ on the unimportant parts of science,leaving the major insights all most untouched.答案是concentrated,为什么不能填Concentrating?后面不是leaving吗?谁能给我讲详细点!为什么要用被动

一个英语语法题不懂I remember,_____ on the unimportant parts of science,leaving the major insights all most untouched.答案是concentrated,为什么不能填Concentrating?后面不是leaving吗?谁能给我讲详细点!为什么要用被动 有一句英语句子不懂,I remember him as angry. 英语语法不懂咋办 英语语法不懂,怎么办? 英语语法一点不懂 英语语法不懂怎么办?怎么复习功课啊 英语语法不懂怎么办? 英语语法选择题（06）3（2）8.I am afraid I should______you of yourpromise.A.remind B.remember C.release D.record--我选了A, remember I sincerit love that song i remember . I can hardly remember I still remember i still remember是什么意思 I'll always remember I hate remembeR your i remember the i remember the green whenever i remember the i remember 什么意思