_________ the meeting room, he found all the parents already ________ there.
The public has complained that large quantities of waste water ______ into rivers without being cleaned, so large amounts of money ______ to solve the problem.
. The World Wide Web is sometimes jokingly called the World Wide Wait because it ______ be very slow.
Many young people in the West are expected to leave ______ could be life's most important decision --- marriage --- almost entirely up to luck.
We missed our train, and ___ the next train was delayed, ____ we had to wait for two hours.
Not only ______ interested in football but ______ beginning to care about it.