Modals of obligation exercises multiple choice - Verb exercises

Choose the most suitable modal verb to complete the sentences.
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I _____ think you are awful or ridiculous Or whatever.
ought
must
should
I suppose we _____ to give them a round of applause.
ought
should
must
The gas supply pipe connected to the appliance _____ be a rigid metal pipe with sealed fittings.
must
ought
should
The anomaly of Australia and New Zealand being counted outside their geographical area _____ be corrected.
must
should
ought
Well, you _____ to know, it 's your wedding.
must
should
ought
That little girl _____ be so confused.
should
ought
must
If a section 's contents _____ to be invariant, make it invariant.
must
ought
should
The man _____ be made an example of!
ought
should
must
You _____ to know, we can hear everything you are saying out in the hall.
must
should
ought
Someone _____ tell her what happened.
should
ought
must