5.9. Заполните пропуски в предложениях модальными глаголами can, may или must: 1.One … identify many plants by studying their leaves.
2.Only plants … create food, animals obtain food only by eating plants or other animals.
3.A leaf … manufacture food by means of photosynthesis, otherwise a plant will die.
4.The structure of a leaf … be different in various species.
5.A leaf … capture the sun's energy and build complex molecules from raw materials.
6.You … see the midrib of the blade without a microscope.
7.Dicot leaves … be either simple or compound.
8.The leaf edge … be indented in various ways.
9.Eucalyptus trees grow in California, but these broad-leavedevergreens … not compete successfully with deciduous trees where the climate turns cold.
10.You … not touch that plant! It's poisonous.
11.You … take those flowers, I'll bring some more.
12.Whatever man does to his forests, he … consider the whole ecosystem, including the soil in its relationship to vegetation.
13.Larches are one of the few species that … stand the climate close to the frigid, empty tundra.
14.A plant … adjust itself to the environment in which it grows if it is to survive.

1) I asked him how long he was going to stay there.
2) I asked Nick where he was going.
3) I asked him how long  it would take him to get there.
4) Pete asked his friends when they were leaving St.Peterburg.
5) He asked them who they would see before they left there.
6) They asked him what time the train started.
7) Ann asked Mike when he had left London.
8) She asked Boris when he would be back home.
9) Boris asked them how he could get to the railway station.
10) Mary asked Tom what time he would come there the hext day.
11) She asked me why I hadn't come there the previous day.
12) She asked me what I would  the hext day if I weren't not busy at my office.
13) I asked Mike what he would do after dinner.
14) I asked my uncle how long he had stayed in the Crimea.
15) Ada asked me where I had seen such trees.

1. Alec said that his friend lived in Moscow.
2. The poor man said that his horse was wild and it could kill my horse.
3. The teacher told me that I hadn't done my work well.
4. My classmate told me that he couldn't explain that rule to me.
5. He said that he had received the letter from his uncle.
6. I said that I could give you my address.

1. They wanted to know what time the train started.
2. She asked me what I would do the next day.
3. I asked my uncle how long he had stayed in Moscow.
4. He wondered where I had bought that hat.
5. She asked me why I had come there the day before.

1. The teacher asked me whether my father worked at a factory.
2. Grandmother asked Mary whether she had done shopping the day before.
3. My sister asked me whether I would take her to the theatre with me the next day.
4. The doctor asked Nick whether he washed his face every morning.
5. Father asked Nick if he had done his homework.
6. The man asked if there were some more books.

1. Tom's mother told Tom to go to bed.
2. The man asked the boys not to play in the street.
3. The teacher asked Nick to give him his book.
4. Father told Jane to show him her homework.
5. The teacher asked the pupils not to open their books.
6. Kate told her grandmother to help her to cook the soup.