2. Сделайте эти предложения отрицательными.
a) We are sitting on the bed.
b) She is watching TV.
c) The bird is singing.
d) We are playing in the park.

a) We aren't sitting on the bed.

b) She isn't watching TV.

c) The bird isn't singing.

d) We aren't playing in the park.

1) мы знаем, что он работает над проблемами в области космической связи.(его работа связана с проблемами).

2) если вы сделаете даже малейшую ошибку в компьютерном языке, разговор ломается и вы должны идти в начало.( наверное, имеется ввиду, ошибка в алгоритме, программа рушится и надо начинать сначала? )

3) читальный зал библиотеки конгресса - это огромная коллекция справочников.

the white leopard lives in горнолесных areas where the obvious preference gives chernopihtovo-kedrovo-shirokolistvennym to woods on the average and headwaters of the rivers. less willingly it occupies широколиственные woods and especially пирогенные the oak forests which areas as a result of annual fires increase. its area covering earlier northeast china, the korean peninsula and the ussuriisk territory south, was reduced now till critically small sizes. the modern area of a far east leopard covers only limited горнолесной area the area about 10-15 thousand in sq. km on a joint of three states of russia, the peoples republic of china, democratic people's republic of korea. the sizes of individual sites at a far east leopard small, about 5-8 thousand in hectare, and animals - strictly territorial predators: each adult animal has the site which isn't blocked with sites of individuals of the same floor.