Ray _____ take medicine three times a day until his ...

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Ray _____ take medicine three times a day until his toothache got better

A. have to

B. don’t have to

C. didn’t have to

D. had to

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We had to turn our mobiles off before the plane took off.

A. The plane hasn’t taken off yet

B. The plane has already taken off

C. The plane is not going to take off until we turn our mobiles off

D. The plane doesn’t allow mobiles