9.2. прочитайте текст и вставьте в пропуски глаголы can/can’t, could/couldn’t или will/won’t be able to так, чтобы они соответствовали содержанию текста. in 1623, william schickard, a german scientist, designed a calculating machine. it (1) multiply long numbers. unfortunately, that first calculator was destroyed by fire, therefore schickard (2) finish his project. unknown to the world for more than three centuries, it was rediscovered in 1957 and led to the creation of modern computers. nowadays computers (3) do lots of things, of course. there are computers in almost every school and office. we use them to talk to people all over the world and we play great games on them, too. however, they (4) replace real people as they (5) only follow our instructions. in the future computers (6) talk and to think as well as to do what they (7) do in the past. yet they will always be machines and they (8) fall in love and be our friends.
We have been walking for three hours.
I'm on a diet , I have been eating nothing but apples for the whole week.
He has been sleeping since ten o'clock.
The students have worked very well this term.
I have been working with him for ten years and he has never said 'Good morning ' to me.
Have you heard the news? Tom and Ann are engaged.
How many baskets of apples have you picked? It seems to me you have been picking them for 3 hours already.
Have you seen my bag anywhere? I have been looking for it for half an hour.