9. дополните следующие предложения подходящими по смыслу вопросительными словами: 1.…is mr. stevence? is he an engineer? 2. …umbrella is his? yours or mike’s? 3. …do you prefer: to rest in summer or to rest in winter? 4. …sort of films do you like best? 5. …do you usually do on sunday? 6. …do you like to see as your assistant? 7. …is speaking? 8. …have you invited to your birthday party? 9. …can i do for you?

1. Who is Mr. Stevence? Is he an engineer?
- The first question is asking about the identity of Mr. Stevence, so the appropriate interrogative pronoun to use is "who". The second question is asking about the profession of Mr. Stevence, so the use of "is" is correct.

2. Whose umbrella is his? Yours or Mike's?
- The question is asking about the ownership of the umbrella, so the appropriate interrogative pronoun to use is "whose". The second part of the question presents two options, "yours" and "Mike's", as possible answers.

3. What do you prefer: to rest in summer or to rest in winter?
- The question is asking for a preference between two options, so the appropriate interrogative pronoun to use is "what". It is followed by the verb "do" to form a question, and the two options are presented afterwards with a colon.

4. What sort of films do you like best?
- The question is asking about the type or category of films that the person likes the most, so the appropriate interrogative pronoun to use is "what". It is followed by the word "sort" to specify the type, and the verb "do" is used to form a question.

5. What do you usually do on Sunday?
- The question is asking about the typical activities or routines that the person engages in on Sundays, so the appropriate interrogative pronoun to use is "what". It is followed by the verb "do" to form a question.

6. Who do you like to see as your assistant?
- The question is asking about the person the individual prefers to have as their assistant, so the appropriate interrogative pronoun to use is "who". It is followed by the verb "do" to form a question.

7. Who is speaking?
- The question is asking about the identity of the person currently speaking, so the appropriate interrogative pronoun to use is "who". The verb "is" is used to form a question.

8. Who have you invited to your birthday party?
- The question is asking about the people the individual has invited to their birthday party, so the appropriate interrogative pronoun to use is "who". The present perfect tense of the verb "have invited" is used to form a question.

9. What can I do for you?
- The question is asking about the actions or assistance the person can provide, so the appropriate interrogative pronoun to use is "what". It is followed by the verb "can do" to form a question.