As more and more cars are produced and used, so the _____ from their exhaust-pipes contains an even larger volume of poisonous gas.
—Would you mind if I closed the window? —______. It’s that cold outside.
The playnext month aims mainly to show the local culture.
The hospital is ______ signs telling patients that it can offer only limited services.
You really need to go out and get some fresh air and sunshine. You ______ overworked during the last two weeks.
—How long do you think it will be ________ we win the football World Cup? —Perhaps twenty years.