The computer was invented in the 1940’s and ______ quite a lot ever since.
You can’t imagine ________ when they heard the news.
She remains optimistic (乐观的) in spite of so much hardship she has _______ .
I was just _______to go out when the telephone rang .
Doing morning exercises _______ our health and we _______ it.
I won’t have anything like that _______ in my class .