问题
When did he work_______the railroad? —From 1904 to 1909.[ ]
A: in
B: on
C: at
D:of
B: on
C: at
D:of
正确答案是：
同类题型
Linda’s father isn’t an engineer. Her mother isn’t an engineer, ______ .
What do you think of the TV show? —_____ my opinion, it was wonderful. [ ]
Susan’s parents have bought a large house with a swimming pool.It be very expensive.
______ does ______ packet of chips cost?
I’m old enough to wash clothes by myself．You can just wash ．