The WTO can’t _____ its name if it doesn’t include a country that is home to one fifth of mankind.
to frighten the poor man, Mrs Richards quickly hid under stairs.
Some insects_______ the colour of their surrounding to protect themselves.
—We’ve spent too much money recently. —Well, it isn’t surprising, Our friends and relatives_______ around all the time.
Joining the firm as a clerk, he got rapid promotion, and _______ as a manager.
It seems that living green is _______ easy and affordable. A small step makes a big difference.