What the hell are you doing?
大量的数学作业搞得我头昏脑胀。
A great number of math exercises make my head swim.
你最好耐心一些，否则会把事情搞僵了。
You'd better be patient, or you might bring things to a deadlock.
这兄弟俩看起来很像，别把他们搞错了。
The two brothers are very much alike. Don't mistake one for another.
他思路搞通了，精神也就愉快了。
Once he straightened out his ideas，he became cheerful again.
这孩子把房间搞得一团糟。
The kid made the room a total mess.
2. It's needless to say
解析：考生应留意否定词译法，即在have，there be及情态动词后面加no或not，在实义动词前面加上do或doesnot，在某些省略句中加上no。本题考查的是派生词用法。和汉语不同，英语单词词根可以加上前缀或后缀以改变单词本义，如ab-，dis-，im-，ir-，il-，mal-，non-，un-，under-，less等都是表示否定意
3. It was unexpected
解析：考生应注意照顾前后时态一致，考查的是"形式主语it+形容词+that-从句"的结构。如果题干改为________(真想不到)his doing a thing like that，答案就要相应改为fancy。fancy one's doing带有更强烈的语气，惊讶程度也比it's unexpected高。
4. has always had the interests of the people at heart
解析：英语里"一心想着"、"总是想着"可以用短语always think about、have sth.. at heart、be preoccupied with sth. 来表达。但是它们的感情色彩是截然不同的。第一个短语是一般性用语，感情色彩为中性;第二个短语感情色彩为褒义;第三个短语往往后接不好的事情，是贬义词。如：
我总是想着一放假就早点回家。
I always think about going back home earlier once on vacation.
王子一心想着复仇。
The Prince was preoccupied with revenge.
5. It was very reluctantly
解析：本题较难。考查的并不是形式主语句，二是一个强调句型。本句可以说成：She agreed to help very reluctantly. 原句的需填补部分是对状语的强调，以突出"极不情愿"这一信息中心。强调句用途很广，我们可以根据上下文和语义意图分别强调句子的主语、间接宾语、直接宾语、状语等。