Вопрос по английскому языку:

Нужна помощь
Выберите форму инфинитива (с частицей “to” или без нее) или герундия.
1. The manager avoids … this issue.
a. discuss b. to discuss c. discussing
2. Our colleagues agreed … in this event.
a. taking part b. to take part c. take part
3. We insist on … a consultant to help us with this phase of the project.
a. hire b. hiring c. to hire
4. The boss promised … our project team in a training class next weekend.
a. to enroll b. enroll c. enrolling
5. The company postponed… the agreement.
a. to sign b. signing c. sign