Only when _________________________.

A. did he arrive the meeting began 

B. he arrived the meeting began.

C. did he arrive did the meeting begin.

D. he arrived did the meeting begin.

He said he would come to see the film, and he _________ arrive before the lights _________．

1. A.
   was supposed to; went out
2. B.
   must; go out
3. C.
   should; turn off
4. D.
   have to; went out

Only when _________________.

A. did he arrive the meeting began       

B. he arrived did the meeting begin

C. did he arrive did the meeting begin       

D. he arrived the meeting began   

_____when she started complaining.

Only when        .

       A．did he arrive the meeting began     B．he arrived did the meeting begin

       C．did he arrive the meeting begin     D．he arrived the meeting began