Изберите правильную неличную форму глагола (инфинитив либо герундий). 1. We must

Изберите правильную неличную форму глагола (инфинитив или герундий). 1. We must _______ you that your payment is overdue. a. inform b. to inform c. informing 2. We have _______ overtime. a. do b. to do c. doing 3. Do you mind _______ the window? a. open b. to open с. opening 4. Catherine managed _______an important customer. a. acquire b. to acquire c. acquiring 5. We look forward to _______ from you soon. a. hear b. hearing 6. Jane is busy _______ invitations for our company39;s anniversary celebration. a. write b. to write c. writing 7. Could you let me _______ my sentence? a. finish b. to finish c. finishing 8. It is hard _______ certain customers. a. please b. to please c. pleasing 9. Let me begin by _______ you something about our company39;s history. a. tell b. to tell c. telling 10. We risk _______ a lot of money. a. lose b. to lose c. losing