Ответ:
1) arrived (прибыл)
2) has never seen (никогда не видел)
3) has never been (никогда не было)
4) did not meet (не встречались)
Объяснение:
1) Sam arrived in San Diego a week ago.
2) Sam is from Colorado, which is hundreds of miles from the coast, so he has never seen ocean.
3) This mountain has never been
climbed by anyone.
4) I did not meet my friends last week.