Many people complained about the stones scattering on a roadway, but ______ did anything about getting the stone out of the way.
--The button in the kitchen is out of order.--_______.
– I’m sorry I can’t go to your party tonight.-- ____________? Haven’t we agreed on it?
-- What’s wrong with your pen?-- The ink ___________ come out.
The population of Africa is __________ so rapidly as to cause great concern of the whole world.
Living with a host family while studying abroad, in which there may be some other college students, __________ you the chance to learn more about the new culture.