I realized that I (forget) to thank them. Which ...

I realized that I (forget) to thank them.

Which is the correct past perfect simple for the sentence above?

A. had forget

B. has forgotten

C. having to forget

D. had forgotten

Select your answer:

Other quiz:

Second Conditional › View

If I could ask for a wish,

A. I would ask that the coronavirus ended

B. I would go to the ancient Tenochtitlan

C. I would check my location with my phone

D. I might get upset

Grammar › View

What is the action verb in this sentence: “Dogs bark loudly.”

A. Dogs

B. bark

C. loudly

D. Dogs loudly