Use the word given in capitals at the end of each line to form a word that fits in the gap in the same line. Why are kittens such (1) animals? They love chasing a ball or a piece of wool, and they always play in a very (2) way. But why? All of a kitten's (3)
when playing are, in fact, important for the future. It might look like (4)
but the kitten is practising its hunting skills. That (5) jump onto a toy teaches the kitten a lot. Think about your own (6) and you'll see that you learnt a lot through play.

PLAY
ATHLETE
ACT
ENTERTAIN
HERO
CHILD

1. I used to live in a flat when I was a child. (+)

Did I use to live in a flat when I was a child? (?)

I didn't use to live in a flat when I was a child. (×)

2. We used to go to the beach every summer. (+)

Did we use to go to the beach every summer? (?)

We didn't use to go to the beach every summer. (×)

3. She used to love eating chocolate, but now she hates it. (+)

Did she use to love eating chocolate? (?)

She didn't use to eating chocolate. (×)

4. He used to smoke. (+)

Did he use to smoke? (?)

He didn't use to smoke. (×)

5. I used to play tennis when I was at school. (+)

Did I use to play tennis when I was at school? (?)

I didn't use to play tennis when I was at school. (×)

7. He used to play golf every weekend. (+)

Did he use to play golf every weekend? (?)

He didn't use to play golf every weekend. (×)

Хлоропла́сты (от греч. χλωρός — «зелёный» и от πλαστός — вылепленный) — зелёные пластиды, которые встречаются в клетках фотосинтезирующих эукариот. С их происходит фотосинтез. Хлоропласты содержат хлорофилл. У зелёных растений являются двумембранными органеллами[Пр. 1]. Под двойной мембраной имеются тилакоиды (мембранные образования, в которых находится электронтранспортная цепь хлоропластов). Тилакоиды высших растений группируются в граны, которые представляют собой стопки сплюснутых и тесно прижатых друг к другу тилакоидов, имеющих форму дисков. Соединяются граны с ламелл. Пространство между оболочкой хлоропласта и тилакоидами называется стромой. В строме содержатся хлоропластные молекулы РНК, пластидная ДНК, рибосомы, крахмальные зёрна, а также ферменты цикла Кальвина[1].