Some people who don’t like to talk much are not necessarily shy; they _____ just be quiet people.
They tried to find a table for two. But they were all _____.
Over two thirds of the population were believed to have no ______ to the health care in the west rural area in China.
You should look _______ into the matter to get more information about it.
They keys were __________ to our neighbours during our absence.
–Are you a teacher? --No, but I ________.