4 A: We 1) (stand) by the door when the children 2) (walk) in.- B: 3) what they looked like? (you/see) A: No. They 4) scary costumes. (wear) 5 A: What 1) when he 2) (you/do)…

Let's fill in the blanks with the appropriate verb forms and provide explanations for each choice.

Completed Dialogue

A: We 1) stood by the door when the children 2) walked in.

B: 3) Did you see what they looked like?

A: No. They 4) were wearing scary costumes.

5 A: What 1) were you doing when he 2) fainted?

B: 3) I called an ambulance.

Explanations:

1. "stood" (stand): This is in the past simple tense, indicating a completed action in the past.
2. "walked" (walk): Also in the past simple tense to describe another completed action that occurred when A and B were standing by the door.
3. "Did you see" (you/see): This is a past simple question form, asking if the person had the experience of seeing the children.
4. "were wearing" (wear): Here, we use the past continuous tense, which describes an ongoing action in the past (the children’s costumes) when A was trying to recall their appearance.
5. "were you doing" (you/do): This is a past continuous question form, which indicates an ongoing action at the time when the fainting occurred.
6. "fainted" (faint): This is in the past simple tense, indicating the completed action of fainting.
7. "I called" (call): This is in the past simple tense, indicating that the action of calling an ambulance was completed in the past.

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