31.Children above 12 are able to take part in skiing or other activities____for them.
The possibility _________ we won’t produce enough goods troubles everyone here.
I don’t like sports _________ people easily get hurt.
. —Why didn’t you response to their greeting? —Sorry. I ______they ______ to me.
--I’ve studied growing plants as one of my interests. Could I make some suggestions?-- ______.
It’s Steven Jobs that _______ the idea of iphone and ipad.