Красная граница фотоэффекта у натрия на вольфраме равна 590 нм. Определите работу выхода электронов у натрия на вольфраме.

Нужно раскрыть скобки и правильно подобрать глагол.

1) She(to live) in Moscow for ten years when her sister (to come) to live with her. 2)Our teacher (to come). Now he (to speak) with our monitor. 3)They (to skeak) when I (to look) at them. 4)What you (to do) here?- I (to prepare) for my report.-How long you (too prepare) for it?-Oh,I (to work) sinc morning. 5)He (to teach) at school for five years when the was (to break) out. 6) She (to study) English since last year. 7) You ever (to be) to London?-Yes? I (to be) there last summer. 8) What your friend (to do) now?- She (to have) dinner.She usually (to have) dinner at this time. 9) I (to buy) a new dress.I ( to show) it to you tomorrow when you (to come) to my place.

H2S - слабый электролит???