—Must I park my car behind the building?—No, you _______. You _______ park it there.A.mustn’t; mayB.may not; mustC.don’t have to; may
-Please keep the secret _______me.-OK. I’ll keep it _______myself.
Why was the house on fire? _______ lightning hit it.
Please _________for my car.
He found _________important to protect wild birds.
The teacher asked us to keep quiet.Which kind of structures does the sentence belong to?