Помогите пж! Срочно! Геометрия

На Северном Кавказе уменьшилась популяция зябликов.С какими экологическими проблемами это связано?

Выбрать приавильный вариант

Before I (had had a chance / had a chance) to look at them, my sister had run ur and pulled them out of my nand.

This was the news I (had been waiting / waited) for. 

When Mum and Dad (hear / had hear) the news? they immediately started shoting with joy.

By the time I (had had breakfast / had breakfast) Mum had already called Grandma and Granpa.