--l knocked over my tea cup.lt went right over___keyboard--you shoud not put drinks near___computer

问题描述:

--l knocked over my tea cup.lt went right over___keyboard--you shoud not put drinks near___computer
A.the ;/ B.the;a C.a;/ D.a;a
为什么?why?

B
我弄洒了我的茶杯,正好落在键盘上---你不能把饮料放在电脑旁边.
后面的computer必须有冠词修饰,否则不成立,keyboard必须加the