Question 12: Most doctors and nurses have to work on a _______ once or twice a week at the hospital.
Based on the meaning in the sentence, we see that answer B is suitable for the meaning of “work on a night shift”: working the night shift
=> Most doctors and nurses work night shifts once or twice a week at the hospital.
The remaining answers:
Solution: solution
Household chores: housework
Special dishes: delicious, special dishes
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