Chọn từ thích hợp điền vào chỗ trống

 Robots can’t talk now. In the future they…………….to talk to people.(can, can’t, could, couldn’t, will be able or won’t be able to)
 In the part, robots……………make coffee but they can now (can, can’t, could, couldn’t, will be able to or won’t be able to

My younger brother…………..do sums when he was 5.(can, can’t, could, couldn’t, will be able to or won’t be able to)
My sister………………..read until she was 6. (can, can’t, could, couldn’t, will be able to or won’t be able to)
 I……………write letters to my English friend (can, can’t, could, couldn’t, will be able to or won’t be able to)
 I like teaching robots. They……….help us study better(can, can’t, could, couldn’t, will be able to or won’t be able to)
Robots……………guard the houses in the future.(can, can’t, could, couldn’t, will be able to or won’t be able to)
……..robots lift heavy things some years ago?(can, can’t, could, couldn’t, will be able to or won’t be able to)
In the future, robots………………understand what we say.(can, can’t, could, couldn’t, will be able to or won’t be able to)