The boy was seen _____ model planes in the classroom.
A. make B. made
C. makes D. to make
_______in 1636, Harvard is one of the most famous universities in the United States.
A. Being founded B. It was founded
C. Founded D. Founding
My sister is often self-centered. She does whatever she likes to, ____other people’s feelings.
A. instead of B. in favor of C. regardless of D. in spite of
Mr. Smith looks very fit. He takes _____ every day.
A. many exercises B. much exercise
C. little exercise D. few exercises
Everyone in our class likes Mary because she is good at telling and _____jokes.
A．turning up B. putting up C. making up D. showing up
AIDS is said ______ the biggest health challenge to both men and women in that area over the past few years.
A. that it is B. to be C. that it has been D. to have been
How strange! These years my birthday always falls _____.
A. on the Sunday B. on a Sunday
C. on Sunday D. at a Sunday
Stick to what you think is right, ________ you will gain a surprising happy ending.
A．and B．but
C．before D．so
It is estimated that nearly 100 million people live here, most of ______ in the west.
A. which B. whom C. that D. them
_____ one of the most important inventions of the time, the computer helps people living in different countries to do a lot of things.
A. Knowing to be B. It was known
C. Known as D. Which was known to be