1. No, we haven’t. D is the only answer that makes sense, as A is conflicting, B is unclear, and C is irrelevant. 2. No, I don’t like to. B is the only answer that makes sense because the other answers are incorrectly structured. 3. Do you like watching this drama? B is the only answer that makes sense because it is the only one that would prompt the woman to bring up another person. 4. Do you enjoy your job? A is the only answer that makes sense because “Would you like to enjoy your job?” is not how the question would be phrased, as it is asking if you would like to enjoy it and not if you do enjoy it.
Independent clause uses commas to separate independent clauses when they are joined by any of these seven coordinating conjunctions: and, but, for, or, nor, so, yet.