Контрольные задания > 10. Run downstairs. Your sister (to wait for) ......... you.
Вопрос:
10. Run downstairs. Your sister (to wait for) ......... you.
Ответ:
10. Run downstairs. Your sister is waiting for you.
Пояснение: Действие происходит в данный момент, поэтому используем Present Progressive (is waiting).