—I'd like a pen which ________ well.
—Will this one ________?
A.writes;do B.writes;work
C.is written;do D.is written;work
I like getting up very early in summer.The morning air is so good ________.
A.to be breathed B.to breathe
C.breathing D.being breathed
Professor Williams keeps telling his students that the future ________to the well-educated.
A.belongs B.is belonged
C.is belonging D.will be belonged
The water ________ cool when I jumped into the pool for morning exercise.
A.was felt B.is felt C.felt D.feels
—What's that noise?
—Oh,I forgot to tell you.The new machine ________.
A.was tested B.will be tested
C.is being tested D.has been tested
—Why does the lake smell terrible?
—Because large quantities of water ________.
A.have polluted B.is being polluted
C.has been polluted D.have been polluted
