, надо поставить предложения в Present perfect или в Past Simple​

3. A Have you ever gone on a couch tour?

B Yes, we have. We went across the USA by coach last July.

A How long did it take?

B Three weeks. We stopped at lots of interesting places on the way.

4. A Have you ever eaten insects?

B Yes, I have. I have bought a bag of insects as a snack in Thailand. But I haven't enjoyed them very much.

(слова-маркеры выделил курсивом)