Упр.2 Юнит 3 Step 8 ГДЗ Rainbow English 11 класс

Приведем выдержку из задания из учебника Баранова, Афанасьева, Михеева 11 класс, Дрофа: 2 Complete the text with the appropriate forms of the words in the asterisks.
How Big Is an Atom?
Let us begin by saying that anything man (1) knows about the atom today might be changed tomorrow. Science constantly (2) are constantly learning new things about the atom as atom-smashing machines (3) are built. The word “atom” comes from Greeks who (4) thought an atom to be the (5) smallest possible particle of any substance. Yet today we (6) have found more than 20 different particles in the core of the atom! Scientists believe the atom (7) is made of electrons, protons, neutrons, positrons, neutrino, mesons and hyperons. How all these particles (8) are held together to make up the atom still (9) is still not known to us.
*Цитирирование части задания со ссылкой на учебник производится исключительно в учебных целях для лучшего понимания разбора решения задания.

Let us begin by saying that anything man knows about the atom today might be changed tomorrow. Science constantly is learning new things about the atom as atom-smashing machines are built. The word “atom” comes from Greeks who thought an atom to be the smallest possible particle of any substance. Yet today we have found more than 20 different particles in the core of the atom! Scientists believe the atom is made of electrons, protons, neutrons, positrons, neutrino, mesons and hyperons. How all these particles are held together to make up the atom still is not known to us.

Ответ: 1) knows 2) is learning 3) are built 4) thought 5) smallest 6) have found 7) is made 8) are held 9) is