（2014年北京市西城区高三5月二模试题）23. It’s been discovered in the study ______ people are more relieved after forgiving others.

A. that B. what C. which D. whose

It suddenly occurred to him he had left his keys in the office.

A．whetherB．whereC．whichD．that

（2014年北京市西城区高三5月二模试题）31. A person who has never tasted bitter won’t know ______ sweet is.

A. which B. what C. when D. why

It is by no means clear the president can do to end the strike.

A. how B. which

C. that D. what

（湖南省怀化市2014年高三第二次模拟考试）28. Word came, as expected, ______ college entrance English exam will be reformed soon.

A. it B. what C. which D. that

There’s a feeling in me  _______we’ll never know what a UFO is—not ever.

A. that          B. which         C. of which         D. what

（2014年福州市高三适应性练习）33.— Your sneeze tells me you may have a flu.

— No. It’s just __________ I can’t stand the smell of the paint here.

A. how B. that C. why D. when

I am afraid he’s more of a talker than a doer, which is ______ he never finishes anything.

A. that B. when C. where D. why

（2014重庆一中高三下第三次月考）7. John enjoys football but he knows the fact _____ he doesn’t have _____ it takes to be a professional.

one children want to challenge themselves by learning a language different from ______ their parents speak at home.

A. what B. that C. which D. one