Question

1. Why don't you let me .............that

for you? I am happy to help.
do
to do
did
done

Answer 1

Step-by-step explanation:

do. You need a present tense ( a simple verb at that)

Did is past

done is also past as in Done meaning completed after it was started a while ago.

to do is an infinitive. You need a simple present tense verb. To go where no man has gone before.

To do what no one has attempted before.