1.When asked to explain _____ he did to make his students so fascinated with his lessons, the teacher paused and
thought deeply.
A. what was it that B. that what it was C. what it was that D. what was it
2.If the weather is fine, we’ll go. If ______, ______.
A. not; not B. no; no C. not; no D. no; not
3.Is it ______ you are always playing computer games ______ really makes your parents so angry?
A. /;that B. what; that C. that; what D. that; that
