问题
Do you know when the television was invented? —Yes, it was invented______ 1927. [ ]
A: in
B: at
C: on
D:of
B: at
C: on
D:of
正确答案是：
同类题型
We are going to have _________off next month, so we will go on a trip.
People are using more and more natural gas, wind and other forms of _____.
They are talking about something ______ the telephone. [ ]
More and more people in Beijing are able to talk and writeEnglish these days.[ ]
How do you usually go to school?—__________ my father’s car. [ ]