单选题 This kind of material expands_______the temperature increasing.

单选题 I am not used to speaking_______public.

单选题 He_______lives in the house where he was born.

单选题 I won’t make the_______mistake next time.

单选题 We came finally_______the conclusion that she has been telling lies all the time.

单选题 He_______driving me home, even though I told him I lived nearby.

单选题 A sudden noise of a fire-engine made him_______to the door.

单选题 People at the party worried about him because no one was aware_______he had gone.