My goodness, who has had the tap water ______ —Sorry, I ____ have it turned off at once.

Some insects ______ the colour of their surroundings to protect themselves.

has promised to keep the secret, so he won’ttell anyone even though ______

an I do foryou, Sir—It is not you waiters but ____ is incharge of the restaurant ___ I want to talk to

He commanded that he students _____ the classroom before he returned.[ ]