Questões Militares Comentadas sobre inglês para efomm

Which word DOES NOT follow the same plural rule applied to the word "nationalities" in the text?

Based on the text, it is possible to infer that:

In "A merchant navy or merchant marine is the fleet of merchant vessels [... ]. ", the word fleet means:

Read the poem below and choose the correct answer.
SEA-FEVER
I must down to the seas again, to the lonely sea and the sky, And all I ask is a tall ship and a star to steer her by, And the wheel's kick and the wind's song and the white sail's shaking, And a grey mist on the sea's face and a grey dawn breaking. I must down to the seas again, forthe call of the running tide Is a wild call and a clear call that may not be denied; And all I ask is a windy day with the white clouds flying, And the flung spray and the blown spume, and the seagulls crying. I must down to the seas again to the vagrant gypsy life, To the gull's way and the whale's way where the wind's like a whetted knife; And all I ask is a merry yarn from a laughing fellow-rover, And quiet sleep and a sweet dream when the long trick's over.

By John Masefield (1878-1967)
According to the text:

Choose the option that correctly completes the sentences below, respectively:

I - The journey was quite quick _______ the road was clear.
II - The meeting has been canceled _______ the strike.
III - I drove at a steady 50 mph ________ save fuel.
IV- There's no reason _______ we shouldn't be friends.
V- _______ all her qualifications, she's useless at the job.