根据语境填入适当的短语或句子，补全对话。

A: It's time for dinner! __1__.  Don't you want it?

B: Fish and chips again! __2__.

A: Why do you say so? It used to be your favorite meal, right?

B: __3__, but I have had fish and chips three times a week.

A: Three times a week! You haven't had it for over a week.

B: But, can I have something else __4__?

A: Well, in that case you'd better go and cook your own supper.

B: Then I'll __5__.

系统采用准同期并列时，必须（）。

A.电压差尽量小

B.相序相同

C.频率相等

D.相角相等