—China’s high-speed railway technology ________ the world now.
—That’s true. It has developed rapidly over the past years.
| A． |
led |
B． |
was leading |
C． |
is leading |
D． |
will lead |
My father goes to work ______ every day.
A. by a bike
B. in a bike
C. on a bike
She ____ back home once a year with her parents.
A. is going B. go C. goes
Look, there is a boy over there _____ the tree.
A. on B. in C. at
I usually walk to school, but I ______ come by bus.
A. some times B. often C. sometimes
We can’t see ____ sun at night.
A. a B. an C. the