---I think Helen is at home.---No, she be at home, for she phoned me from the airport just five minutes ago.
Last month,part of Southeast Asia was struck by floods,from _______ effects the people are still suffering.
The factory produces half a million pairs of shoes every year, 80% _______ are sold abroad.
We are living in an age _______ many things can be done on computers and the Internet.
Her sister has become a lawyer, _______ she wanted to be.
_______ is often the case, we have worked out the production plan.