... BT TRẮC NGHIỆM TIẾNG ANH 9 GRAMMAR TEST D (UNIT 7 +8) Choose the best answer to complete the following sentences. 1. My mother has ... nice clothes when they go out. (in / off / into / on) 8. Before you go to bed, please turn ______ all the lights. (off / on / in / over) 9. Please turn ______ the gas, I want to cook my lunch. ... have to complete an assignment. (and / so / but / or) 18. He likes to travel, ______ so does she. (and / or / but / therefore) 19. The new models are expensive, ______ efficient. (however...