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
Young trees should ________ every day.
#45076
A
water
B
watered
C
be watering
D
be watered
---Mum, can I go to the zoo with Linda? ---When your homework _______, you can. 
#45068
A
is finished
B
was finished
C
finishes
D
finished