помогите с английским! задание номер 3, желательно с переводом. заранее спасибо!

Вы обязательно должны получить среднее образование.
а) can b)must c)should

Dear Jan and
Phil,

We (have)__________ a wonderful holiday. This really is a great place. I (never be)
__________ anywhere like it before. People are friendly, the food is great, and the weather’s a lot better then at home. We (be) ________ here for ten days now, and we (have) _________ sun every day. Can you (believe) ______ it? I (swim) _______ two or three times a day, but Bill just (spend) ____________ all his time lying on the beach with his eyes closed. Sometimes he (write) __________ a postcard, but then he (forget) _________ to post it.
Last Saturday I (get) _________ on a bus and (go) ________ to the north end of the island. It
(be) __________ very beautiful. Tomorrow we (go) ______________ to the east coast (see) _________ some of old villages, if Bill (wake) __________ up in time. And next week, if the weather (be) _________ still nice, I (think) ________ I (do) _________ some walking in the
mountains.