1. Jim knows little of mathematics, ____________ of chemistry.

　　A) and still less B) as well as C) no less than D) and still more

　　【答案解析】：A) less与little才是递进的关系。

　　2. The man denied ____________ any thing at the supermarket when he was questioned by the police.

　　A) to have stolen B ) to steal C ) having stolen D ) having been stealing

　　【答案解析】：C) 在deny之后要用动名词。

　　3. Did he tell you what ____________ if he had a chance?

　　A) was he going to do B) he would do C) be had done D) had to do

　　【答案解析】：B) 在tell you的后面是一个宾语从句，而在这个宾语从句中用的是虚拟语气，看清这一点后，再看看if状语从句中的时态就能做出正确答案了。

　　4. The results were to ____________ yesterday, but we have heard nothing.

　　A) reveal B) have revealed C) be revealed D) have been revealed

　　【答案解析】：D) 首先，我们知道结果是要“被公布”的，所以动词部分必须用被动语态，去掉A)、B)。再由句子的意思判断，结果本来要被公布的，但是我们没有听到什么消息，隐指消息未被公布，所以这是个虚拟的。

　　5. Calculations, which are astronomically exact, have been made ____________ with the use of computers.

　　A) possible B) it possible C) possibly D) to be possible

　　【答案解析】A) 这是一个固定句型。由make … possible变化而来。