N1 one key + two keys=three keys. four cats -three cats=one cat. two keys + three keys=five keys. six cats+two cats= nine cats. со вторым думаю справится легко.
1) This English film was seen by the students.
2) His notebook was left at home.
3) His report was just finished.
4) This book was bought yesterday.
5) This newspaper has been taken by my friend.
6) His English is being worked successfully.
7) Was Moscow found by Yury Dolgoruky in 1447?
8) The territory of Russia is washed in the east by the Pacific ocean.
9) An important role in educational process of our future militia officers is played with sports.
10) Future investigators, detectives for Moscow and Moscow region are trained with the Law Institute.
11) Lectures and tutorials are attended with Internet by the students.
12) This exercise has been done successfully.
13) This text was translated last time.
14) Many interesting books can be found in our library.
15) Many new English words must be learned.
<span>There are
spiders under the chair. There is a book in the bedtable. There are some
apples on the table. There is a snail under the bed. There is a<span> toy under the blanket.</span></span>