The OA is D indeed... I picked A

didn't see any idioms as it wasn't the focus of my h/w... and I am not good with idioms anyways...
I wanted to briefly disscuss the CONDITIONALS and the TENSES that practically give the wrong answers away... you might know it already, but review is always helpful (feel free to add what you know on this matter)!
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Conditional Sentences are known as Conditional Clauses or "If" Clauses. They are used to express that the action in the main clause (without if) can only take place if a certain condition (in the clause with if) is fulfilled.
There are 3 Types of those:
Type 1
It is possible and also very likely that the condition will be fulfilled. We don't know for sure whether the condition actually will be fulfilled or not, but the conditions seems rather realistic – so we think it is likely to happen.
Formula:
if + Simple Present, will-Future
Example: If I
go to Ireland, I
will visit Dublin.
Type 2
It is possible but very unlikely, that the condition will be fulfilled. Conditional Sentences Type II refer to situations in the present. An action could happen if the present situation were different. I don't really expect the situation to change, however. I just imagine „what would happen if …“
Formula:
if + Simple Past, Conditional I (= would + Infinitive)
Example: If I
went to Ireland, I
would visit Dublin. (I felt this one sounded kind of awkward, but I guess gramatically correct)
Type 3
It is impossible that the condition will be fulfilled because it refers to the past. Conditional Sentences Type III refer to situations in the past. An action could have happened in the past if a certain condition had been fulfilled. Things were different then, however. We just imagine, what would have happened if the situation had been fulfilled.
Formula:
if + Past Perfect, Conditional II (= would + have + Past Participle)
Example: If I
had gone to Ireland, I
would have visited Dublin.
REMEMBER:
1)"WOULD/WILL" never appears in the "IF" clause and you can easily eliminate choices based on that fact!!!
2) If the tense is PRESENT SIMPLE, then, the condition is likely to be either PAST SIMPLE or FUTURE SIMPLE, NOT anything else, meaning the tenses should be parallel (If PAST PERFECT -> Then PRESENT PERFECT) etc
3) Do NOT go by "what sounds right"... YOU WILL get it wrong... So if this subject is your weak area (like it was mine) never go by this rule!
4) If I WERE blah..., the blah... many know this rule (i didn't, it thought it was SVA

)
if you want practice quizzes, here is the link:
https://www.englisch-hilfen.de/en/exercises_list/if.htm
please add more...
DISCLAIMER: some of you know that I am doing GMAX, but this is NOT their material... this is my own efforts of Google search to get more info on the subject!