[ Modals Verbs ]
The rules ____ carefully.
A. must be followed
B. must follow
C. must be followed
D. are follow

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Grammar › ViewTheir neighbors are very welcoming people.
The complete subject is highlighted.
What is the simple subject?
A. their
B. neighbors
Conjunctions › View
I couldn’t attend the event ___ I had an important meeting.
A. but
B. and
C. because
D. so
