With the development of science, more new technology________to the field of IT．

A．has introduced

B．is being introduced

C．is introduced

D．was introduced

It looks like the weather is changing for ________．Shall we stick to our plan?

A．the worse

B．worse

C．the worst

D．worst

I wanted some paper but there was ________ in the house．

A．nothing

B．none

C．no one

D．not one

Many lifestyle patterns do such ________ great harm to health that they actually speed up ________weakening of the human body．

A．a;/

B．/; the

C．a; the

D．/;/

Teaching as a career ________ many people because of the long history．

A．attracts

B．calls

C．appeals

D．pulls

The school should ________ immediately to the parents' request that students attend classes on Sundays．

A．answer

B．obey

C．follow

D．respond

We have been told that under no circumstances ________ the telephone in the office for personal affairs．

A．may we use

B．we may use

C．we could use

D．did we use

You must be there within an hour．There should be no ________ in sending the information．

A．question

B．hesitation

C．delay

D．problem

________ with a large family, poor Jack had to work hard day and night．

A．Burdened

B．Burdening

C．To be burdened

D．Having burdened

The needle treatment ________ the ancient times in China is gradually accepted by experts in medicine in other countries．

A．which dated from

B．dated from

C．dating from

D．which was dated back to