Поставьте глагол в скобках в соответствующее время группы indefinite или perfect.
1. the alkaloid of opium (to constitute) about 25% by weight.
2. the attention to natural sources of drugs (to increase) at present.
3. since ancient times man (to use) different parts of plants for medicinal purposes.
4. by the time of harvesting the amount of active constituents (to become) the highest.
5. botanists (to collect) the leaves of this plant before the maturing of fruits and seeds.
6. since the war the institute of medicinal and aromatic plants in moscow (to develop) and (to bring into use) some 60 medicinal preparations.
7. the specialists recommend a clinical use of the drug as it already (to pass) necessary laboratory investigations.
8. we studied the methods of storing new medicinal herbs after we (to carry on) their cultivation.

Russian people usually celebrate their birthday by having a party either at home or at a cafe or restaurant. Close friends and relatives are invited to the party. Guests say nice things about the birthday person and give their presents to him or her. The party lasts a few hours. Typically there is a lot of tasty food and a big birthday cake. Sometimes there are different fun activities at the party, such as dancing contests and playing games.

Россияне обычно отмечают свой день рождения, устраивая вечеринку дома, в кафе или ресторане. На вечеринку приглашаются близкие друзья и родственники. Гости говорят добрые слова об имениннике и дарят ему подарки. Вечеринка длится несколько часов. Как правило, готовится много вкусной еды и большой торт. Иногда на вечеринке проводятся разные веселые мероприятия, такие как конкурсы танцев и игры.

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Объяснение:

General characterization: bad, free, great, strong, old-fashioned

Size: big, large, small, tiny, huge, little

Age: youthful, teenage, antique, recent, young, ancient, mature, infantile

Shape: zigzag, round, flat, spherical, triangular, straight, circular, square, oval

Color: red, black, brown, transparent, white, yellowish, blue, pink, orange,

Purpose: dance, sleeping, military, political, swinging, walking, racing, cooking, work

Origin: Floridian, international, oceanic, local, Irish, French, Spanish, Australian, equatorial, northern, polar, American,

Объяснение: