losses____friction occur in every machine
1because of 2owing to 3due to 4owe to
答案是3
我想知道1，2不选の理由
我语法不好，希望讲得明白易懂の解答出现。
pick my purse away哪些意思？真の是这个搭配嘛？
committeeの单复数情况？？要有例句。
This gunpowder may lesd to more serious explosion if ____ unsolved
1left2remained
答案是1，为何不用2？？？
I cannot thank you too much for your kindness.
哪些意思？？为何用too?
不用that??
I still think enough attentionshould be paid to___your English pronounciation .
1improving 2to improve
答案是1
但我觉得是2
我认为是断句问题should be paid to/to improveyour English
答案不对嘛？
望解答！！

losses____friction occur in every machine
1because of 2owing to 3due to 4owe to
答案是3
我想知道1，2不选的理由
我语法不好，希望讲得明白易懂的解答出现。
due to + 引起后果的直接原因    owing to 归功。与。。   because of 最普通的用法，有3due to 就部用他了。
pick my purse away 什么意思？真的是这个搭配吗？
committee的单复数情况？？要有例句。
This gunpowder may lesd to more serious explosion if ____ unsolved
1left 2remained
答案是1，为什么不用2？？？
remain 仍然保持原来状态    left 有丢弃的意味
I cannot thank you too much for your kindness.
什么意思？？为什么用too?
不用that??
I still think enough attention should be paid to___your English pronounciation .
1improving 2to improve
答案是1
但我觉得是2
我认为是断句问题should be paid to/to improveyour English
答案不对吗？
答案是1.to 是介词后面要求＋名词或动名词。 2：句中已经有to了 重复。

11because of 强调未知
  另外的情调已知
2left 及物动词
remain不及物动词，无被动