Question

Venu _____ (receive) the letter a week ago

Answer 1

The correct answer will be, “Venu received the letter a week ago”

Here it is specifically mentioned that the letter was received a week ago.

Hence, they are talking about this whole situation in the past form.

Since she already has that letter with her.

Hence, the best formation will be the verb + ed form for the past tense.  

Answer 2

In the given sentence” Venu---------the letter a week ago” we can see that there is a conversation going on about something that has already happened that means the correct word will be received.

So here is the complete sentence will be “ Venu received the letter a week ago”