Bikes ______ in the 1880s and they ______ traveling around.
#45063
A
were invented; were used as
B
were invented; are used for
C
was invented; was used for
D
invented; are used to
推荐题目
More and more people have realized that we won’t have cleaner water to drink unless something _______soon.
#44577
A
is done
B
was done
C
will be done
D
to be done
—Hey, Jack. Waste paper ________ here.—Sorry, I won’t do that again.
#44557
A
cannot throw
B
cannot be thrown
C
will not throw
D
will not be thrown
Bamboo can ___________ paper.
#44992
A
used to make
B
be used make
C
be used to make
D
be used to making
