пожалуйста помогите решить 3 задачи

1.Choose the correct variant.

1) ....this is....boy....boy sits at....desk.
a ) -, a, the, the; b) the, a, the, -; с) -, a, the, -; d) a, a, the, -.
2) There is....clock on....wall.
a) The, the; b)a, the; c) -, the; d) a, a.
3) ....London stands on ....river Thames.
a) -, the; b) the, the; c) -, the; d) the, -.
4) I like .... second second song better than ....first song.
a) a,the; b) -, -; с) the, the; d) -, a.
5) Would you like....cup of .....tea?
a) The, -; b) the, the; с) a, -; d) -, -.

2. Write the plura. Make all necessary changes.

1) This is a nice photo.
2) There is a wolf in this cage.
3) Is there a mouse in the kitchen?
4) The man `s tooth was white.
5)The news is good.

3.Complete the sentences with words must(not),have to, can, may,be allowed to, should

1) Ему разрешается..... .........go home now.
2)он недолжен...... ..........be late.
3)Можно..... ..........I come in?
4)Им следует....... ..........learn new words every day
5)Ей приходится....... .........study and work.