I ............. do my washing because my mother does it ...

★ Modal Verbs - Obligation

I …………. do my washing because my mother does it for me.

A. must

B. mustn’t

C. don’t have to

D. doesn’t have to

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The museum is free. You …………. pay to get in.

A. mustn’t

B. don’t have to

C. doesn’t have to