The red suitcase is expensive ______it’s made of leather.
A. when B. if
C. because D. though
Could you show me how to ________ this new recorder?
A. operate B. listen
C. look D. learn
Some people think that CD-ROMs will soon be _________ books.
A. as more popular as B. the most popular than
C. so popular as D. more popular than
I didn’t _____ you were going to leave_____ 3 o’clock.
A. find; at B. realize; until
C. remember; before D. tell; after
A human ______ can do some things better than a computer, for example, creating new ideas.
A. head B. body
C. brain D. arm
Alice ____ eat meat so that he can keep herself from getting too fat.
A. rarely B. always
C. nearly D. carefully