. It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.
After ___ more chatter, the lady returned home.
Why! I have nothing to confess._____ you want me to say?
---I called you last night, but nobody answered. ---Oh, I usually___off my cellphone by 9:00 p.m.
---You aren’t looking well. Anything the matter? ---I’ve been surfing the net too long. I’m a bit tired.I can hold on,____.
All of the things there are inexpensive, with prices ________ from about $1 to $10.