Choose the right variant 1. i broke my leg yesterday and i … take part in the football match. a) can’t b) couldn’t c) could 2. mr garret … have a personal bank account. a) doesn’t b) don’t c) isn’t 3. … birthday is it next week? a) whose b) whom c) who 4. run downstairs. your sister … for you. a) waits b) waiting c) is waiting 5. perhaps they …a new house next year. a) will buy b) buy c) shall buy 6. don’t worry about your letter. i … it yesterday. a) have sent b) sent c) sended 7. timothy can play cricket well, …? a) doesn’t he? b) can he? c) can’t he? 8. my elder sister is afraid … height. a) - b) of c) with 9. i don’t want … or help. a) advices b) an advice c) advice

Here are the correct variants for each sentence:

1. b) couldn’t
   The sentence refers to a specific ability or possibility in the past ("yesterday"), so the past form of the modal verb can is required.
2. a) doesn’t
   "Mr. Garret" is a third-person singular subject (he). In the Present Simple tense, the negative auxiliary verb for "he/she/it" is does not (doesn't).
3. a) whose
   "Whose" is the possessive interrogative pronoun used to ask who something belongs to. "Whom" and "who" are object and subject pronouns and cannot show possession of the "birthday."
4. c) is waiting
   The command "Run downstairs" implies that the action is happening right now, at the moment of speech. This requires the Present Continuous tense (am/is/are + verb-ing).
5. a) will buy
   The word "perhaps" and the time marker "next year" indicate a future prediction or possibility. "Will buy" is the standard form for future intentions. "Shall" is rarely used with "they" in modern English.
6. b) sent
   The sentence specifies a finished time in the past ("yesterday"), which requires the Past Simple tense. "Sent" is the irregular past form of "send." "Sended" is grammatically incorrect.
7. c) can’t he?
   In a tag question, if the main statement is positive ("can play"), the tag must be negative ("can't"). The auxiliary verb from the statement ("can") is repeated in the tag.
8. b) of
   The adjective "afraid" is always followed by the preposition "of" when indicating the source of the fear (afraid of height, afraid of spiders).
9. c) advice
   The word "advice" is an uncountable noun in English. It cannot be used in the plural ("advices") and cannot be used with the indefinite article "an."