— A computer is very popular and helpful .
— I think so. It _______ in many different fields.
A. used B. will use
C. is used D. was used
My uncle is an experienced teacher. He_____English since 2002.
A. teachesB. taught
C. has taught D. will teach
Mr. Green _______ his lessons when I went into his office.
A. preparesB. prepared
C. is preparing D. was preparing
—Tom, What did you do last Sunday morning ?
— I _______ my grandma with my parents .
A. visitedB. visit
C. will visitD. have visited
Our teacher usually gets to school a little _______ than our students.
A. earlyB. earlier
C. earliestD. the earliest
We are often told_______ water in our daily life.
A. save B. saving
C. to save D. saves
