Urgent: help me with the two gramma problems!!!

Test Preparation SAT Preparation
1

<p>Can anyone explain the answer to the following two gramma problems? Thanks a lot!
1.According to last week's survey, most voters (were disappointed by) (legislators')
A Ｂ
inability (working) (together on) key issues. E:No error
　　　　　　Ｃ　　　　　　Ｄ
The right answer:C why? I thought it should be disappointed with or something~~~</p>

<p>2.Most major air pollutants cannot be seen, although large amounts (of them)
A
（concentrated in) cities (are visible) (as) smog.<br>
B C D E: no error</p>

<p>The right answer:E I thought it should be "concentrated on "</p>

<p>Help me Please！！！！！！！！！！！</p>

2

<p>you’re getting all worked up and over-looking for idioms. those words are perfectly fine. I suggest you memorize your idioms and stick to those words because you seem to have a problem identifying them</p>

<p>the first one is c because it should be “to work”
the second one is e because there’s nothing wrong with it. Think about it, the way you’re imagining it, you’re probably thinking of “concentrated on” in the sense that someone’s really focused on something.</p>

3

<p>Er, thanks a lot for your advice and explaination. I am gonna go to review the idioms~~~</p>