Question

039.
Fill in the blank :
I wondered who ....
(A) had left the door open
(C) the door had opened left
(B) the door had left open
D) the door open had left​

Answer 1

Answer:

A)

Explanation:

A)had left the door open.

In options option A sounds grammatical.

Answer 2

I wondered who  had left the door open

Answer:  Option A

Explanation:

The question asks us to fill in the appropriate option into the blank stating which form of verb needs to be filled in the blank space. Had depicts what had happened in the past in each sentence.

The statement, therefore, asks us to fill the form of the verb which had happened in the past and which was supposed to happen when someone had left the door open.

The other examples of had are:

I had food early this morning.

I had a bad headache since afternoon