问题补充:
---- the door, please.
----Come in please. The door .
A. Be open; opens
B. Be open; is opening
C. Open; opens
D. Open; is open
答案:
A. Be open; opens
B. Be open; is opening
C. Open; opens
(答案→)D. Open; is open
解析:原句意思是:——请开门。——请进,门是开着的。Open具有动词和形容词两个词性,从原句看,前面的open是动词,表示动作,后面的是形容词,表示状态。故选D。