Question : Directions: In the following question, a sentence is given with a blank that is to be filled in with an appropriate word. Four alternatives are suggested; choose the correct alternative out of them as your answer.
Do your best and we'll back you____.
Option 1: on
Option 2: in
Option 3: out
Option 4: up
Correct Answer: up
Solution : The fourth option is the correct answer: up.
The phrasal verb " back up " means to support someone and this is the only sentence that fits the sentence appropriately.
Therefore, the answer is "Do your best and we'll back you up ."
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