_____ underground for 2 years, David says the worst thing is not the danger but the darkness.
—It’s a long time________I saw you last.—Yes,and what a pity it is now that it will be a long time________we see each other again.
The factory produces two million pairs of shoes every year, half _______ are sold abroad.
We should develop the sunshine project actively, because it can save _______ resources as well as reduce pollution.
—The box looks so heavy. Shall I give you a hand? — Thank you. _______.
Does anyone have any different opinions about the plan _______ at the meeting?