Sentence Completion Answers:
- 15. I need to go to the electronics shop to buy a battery for my MP3 player. (Batteries for electronic devices are sold in electronics shops).
- 16. Take off your jumper and put it into the washing machine. ('Take off' is the correct phrasal verb for removing clothing).
Explanation: Sentence 15 requires choosing the shop that sells batteries for electronic devices. Sentence 16 requires selecting the correct phrasal verb to describe removing clothing.