_____ the environment is important for human beings.
A.Take care of B.Taking care of C.Took care of D.Take the care of
I can’t stand _____ for you so long.
A.to wait B.waiting C.waits D.waited
—Is the bag beautiful?
—Yes, at _____ it’s _____ the one you bought for me.
A.last; as bad as B.least; no better than
C.last; not better D.least; no worse than
Our teacher told us that light _____ much faster than sound.
A.traveled B.travels C.is traveling D.was traveling
In our class _____ of the students _____boys.
A.third fifths; is B.third fifth; are C.three fifth; is D.three fifths; are
—_____ you _____ your homework yet?
—Yes, I _____ it ten minutes ago.
A. Did ; do; finished B. Have; done; have finished
C. Have; done; finished D. Will; do; finish
