The door opened and _____,followed by several other doctors.

问题描述:

The door opened and _____,followed by several other doctors.
A.entered a doctor B.there entered a doctor
C.did a doctor enter D.then did a doctor enter
为什么不是A呢?

因为and的前后形式一致,opened和entered时态是一致得,但是door opened是门被打开的意思,如果选a就是被进来以为医生,如果加上一个地点代词there 意思就是门开着进来一个医生就没有被动的意思了