Many experts believe that teachers’ development is _____ the key to better educ

题型：不详难度：来源：

Many experts believe that teachers’ development is _____ the key to better education lies.

A．that

B．what

C．where

D．which

答案

解析

略

举一反三

Bad habits, ____formed, are difficult, and sometimes impossible to shake off.

A．once

B．before

C．until

D．unless

题型：不详难度：| 查看答案

As you can see, we need the equipments, ___________ are necessary to make the project move on.

A．all of which

B．all of them

C．all that

D．all what

题型：不详难度：| 查看答案

Is it, in your opinion, possible __________ new measures will be taken to improve the terrible traffic?

A．whether

B．what

C．when

D．that

题型：不详难度：| 查看答案

—Your flight was quite late last night.
—Yes, it was midnight __________ our plane finally got to Jinan.

A．that

B．when

C．since

D．until

题型：不详难度：| 查看答案

Cable TV began in 1948 in the USA, but it took 50 years ________ 66 percent of American households
had it.

A．before

B．when

C．after

D．until

题型：不详难度：| 查看答案