Use the appropriate form of the infinitive. enemy army was reported (to overthrow) the defense lines and (to advance) towards the suburbs of the city. le seems (to know) French very well: he is said (to spend) his youth in Paris. You had better (to call) our distributors at once. We are happy (to invite) to the party. 9. That firm is reported (to conduct) negotiations for the purchase of sugar. 10. It seemed (to snow) heavily since early morning: the ground was covered with a deep layer of snow. 11. He didn't hear me (to knock) at the door. 12. I want (to inform) of her arrival. 13. Our sportsmen are proud (to win) the cup. 14. He is known (to work) on the problem for many years. 15. The representative of the firm asked for the documents (to send) by air mail. с переводом

Here is the completed text with the appropriate forms of the infinitive, along with the translations: 1. The enemy army was reported **to have overthrown** the defense lines and **to have advanced** towards the suburbs of the city. (Сообщается, что армия врага свергла линии обороны и продвинулась к окраинам города.) 2. He seems **to know** French very well: he is said **to have spent** his youth in Paris. (Кажется, что он очень хорошо знает французский: говорят, что он провел свою юность в Париже.) 3. You had better **call** our distributors at once. (Вам лучше сразу же позвонить нашим дистрибьюторам.) 4. We are happy **to be invited** to the party. (Мы рады, что нас пригласили на вечеринку.) 5. That firm is reported **to be conducting** negotiations for the purchase of sugar. (Сообщается, что эта фирма ведёт переговоры о покупке сахара.) 6. It seemed **to have snowed** heavily since early morning: the ground was covered with a deep layer of snow. (Казалось, что снег шел сильно с раннего утра: земля была покрыта глубоким слоем снега.) 7. He didn't hear me **knock** at the door. (Он не слышал, как я стучал в дверь.) 8. I want **to be informed** of her arrival. (Я хочу, чтобы мне сообщили о её прибытии.) 9. Our sportsmen are proud **to have won** the cup. (Наши спортсмены гордятся тем, что выиграли кубок.) 10. He is known **to have worked** on the problem for many years. (Известно, что он работал над этой проблемой многие годы.) 11. The representative of the firm asked for the documents **to be sent** by air mail. (Представитель фирмы попросил, чтобы документы были отправлены авиапочтой.) Feel free to ask if you need more help!