Surely, he thought, I can't trust this enticing yet dubious offer, although I could use the opportunity more than I'd like to admit. Which of the following parts of speech is the word "although"?

Signing in this sentence describes a noun as it is a “thing” rather than an action.

A complete sentence has a subject (noun), verb, capital letters, punctuation and finally must make sense. B is the only complete sentence that explains the action and nouns in a way that makes sense.

The peer review process is never an easy one and takes a lot of time and attention.

Preliminary is what comes first and hence best shows the introductory parts.

A citation is normally used to cite specific information that has been researched by other people. D is only showing a location and not necessarily a product of a research and hence does not need any citation.

B shows both the simple and complex sides of organic gardening, which is exactly the correct support for the given thesis.

Inter in this case means “in between”

The word “wow” can certainly be marked as an interjection as the word is in useto show the emotion of “surprise” of the speaker about the ability of the addressed person to qualify the hurdle in the first attempt.

Having commas that separate the additional information “which had been parked on a steep hill” is the most correct use of the punctuation because it shows that the sentence can do without that piece of information. The additional information is only used to add more details but can still be excluded and that is why it is enclosed in commas.

The plural of words ending with “f” are usually replaced with “ves” at the end, making the C the correct answer.