Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions

Mark letter A, B, C or D on your answer sheet to indicate the sentence that is closest in meaning to the original sentence in each of the following questions.
We’ll get there early so that we’ll be able to get tickets.
A.If we got there early, we would be able to get tickets.
B.Because we get there early, so we’ll be able to get tickets.
C.Unless we get there early, we’ll be able to get tickets.
D.If we don’t get there early, we won’t be able to get tickets.
You know what? The lake is not (22)_____ anymore. The factory has installed a new filtration system to treat the (23)_____ waste. I saw lots of small fish in the lake and wild ducks swimming in the water. Besides, they have planted trees around the factory to (21)_____ air pollution.
‎What about your neighbourhood? Has anything been done to make it cleaner? Tell me all about it in your next email.
‎Bye for now,
‎Mi
A.chemical
B.physics
C.physical
D.chemistry