It must be Helen.
一定是海伦.
敲门的时候,这是固定用法.
例A:Who is that?
B:It is Eva.
A：（主人问）
B：是Eva（回答的人说）
)
who is knocking on the door ___must be Helen.
1个回答
相关问题
-
Is Helen knocking at the door?
-
—Who______ it be that is knocking at the door? —
-
—Who______ it be that is knocking at the door?
-
---who______it be that is knocking at the door?
-
someone is knocking at the door.who [ ]it be?
-
---There is somebody knocking at the door. Who________ it be
-
--Listen! Someone is knocking at the door. Who _____it be?
-
listen!someone is knocking at the door.------ must be my cou
-
6.There is someone knocking at the door,who _____ it be?
-
—There is someone knocking at the door - who