Complete the sentences. Circle the right letter Example: Nowadays there ... many endangered animals on the planet a) were b) are c) will be

1. Unfortunately, we ... cut down the old trees in the park last year.

a) have to   b) will have to   c) had to

2. Where are the children? - They ... Lotto in the living room.

a) are playing   b) play   c) played

3. They ... their work a month ago. Now there is a nice pond in the park.

a) start   b) started   c) have started

4. The scientisit ... his book about rare insects yet.

a) won't ... finish   b) didn't ... finish   c) hasn't ... finished

5. What ... you ...? - It's the picture of my kitten.

a) are ... drawing   b) do ... draw   c) have ... drawn

6. ... you ... a good time in the wildlife park yesterday?

a) Do ... have   b) Did ... have   c) Have ... had

7. ... you ... me to set the table? - Yes, of course.

a) Do ... help   b) Did ... help   c) Will ... help

8. Peter is fond of sport. He ... football three times a week.

a) play   b) plays   c) is playing

1) для начала узнаем, сколько часов в 3-х днях: в одном дне 24 часа, значит 24×3=72 (часа)

2) теперь можно узнать, сколько раз по 4 часа получается: 72÷4=18

3) если за каждые 4 часа получаем 68 литров, то 18×68=1224 (литра)

ответ: за 3 дня мы получаем 1224 литра молка