| A. Nor, I and Paul have finished our studies. |
Incorrect |
The use of "Nor" is wrong here; it should be used with "Neither" (Neither Paul nor I have finished...). Also, the correct subject pronoun order is Paul and I, not I and Paul. |
| B. A year has gone by for he left us. |
Incorrect |
The word "for" is used incorrectly as a conjunction/preposition of time here. The correct word should be "since". |
| C. The pile of books are missing. |
Incorrect |
This is an error in Subject-Verb Agreement. The main subject is "pile" (singular), not "books" (which is part of the prepositional phrase "of books"). The singular subject requires the singular verb "is". (The pile of books is missing.) |
| D. I am not familiar with all the places in the city, although I have been living here for two years. |
Correct |
This sentence is grammatically sound. It uses the correct tense (present perfect continuous: have been living) to describe an action that started in the past and continues up to the present. The conjunction "although" correctly links the two contrasting ideas. |
