Choose the grammatically correct sentences. More than one answer is possible.

Tick the correct answers.

• What she will have achieved by the time she is 30 years old?
• Sophie arrives at her grandmother's house by then.
• By the time I will be 70 years old, I will have seen 50 countries.
• English classes will have already begun by the time she arrives at school.
• By the end of the year, they will have built a new kindergarten in the city.