1 Jan and Daniel had been/were on an adventure together before the polar challenge.

Jan and Daniel had been on an adventure together before the polar challenge.

Explanation:

The use of "had been" or "were" depends on the time frame of the event. "Had been"(past perfect continuous) is used for a past event that is also applicable for the present or current event. Whereas, "were" (past tense of ‘be’) is used for a single past event that no longer applies to another event.

In the given sentence, Jan Meek and her son Daniel are together on the polar challenge. And they had been on an adventure before the polar challenge, which justifies the use of "had been". This shows that the duo's adventure is not a one-time event but that they were together for a previous adventure and are had gone on another after that previous one.  

Thus, the correct verb is "had been".  

eli whitney was an american inventor best known for inventing the cotton gin. this was one of the key inventions of the industrial revolution and shaped the economy of the antebellum south.

hello,

your answer is a) the metaphor suggests that the poetic themes are serious and dark.

collins is comparing the poem to a dark room. he is suggesting that the poems theme is serious and wants you to understand it. you don't need to understand the poet in order to understand the poem. you also don't need to move around while reading it. he is simply saying the poem has a dark and serious theme.

- i.a -