Fill in the blank with the most appropriate word.
Mike and Jack ______ here five months ago. They ______ in this city for five months.
Answer : A
Important thing to determine the sequence of tenses in a sentence is to know that it is arranged in the order is Past --> Present --> Future, just as it happens in real life. Therefore, it is important to determine the occurrence of each action relative to each other.
Reading the first sentence
in the question, we understand that first Mike and Jack moved to the city at some point in the past (as indicated by the word "ago"), thus we will use past tense -- "came".
The second sentence thus could either mean that after they arrived they either lived (past tense - "were") in that city for 5 months or are still living in that place (present perfect progressive - "have been").
The only option that provides correct words for both the blanks is Option A.
Thus, the correct complete sentence is:
Mike and Jack CAME here five months ago. They HAVE BEEN in this city for five months.