The doctors know that it is very difficult to save the patient's life, _______they will try their best.
A.but
B.despite
C.however
D.although

In making remarks, he _______to understatement.
A.aligned
B.intended
C.inclined
D.declined

Thanks to the invention of labor-saving _______, domestic chores are no longer a burden.
A.devices
B.equipment
C.things
D.furniture

They are conducting a wide ______ _ of surveys throughoutVietnam.
A.selection
B.collection
C.group
D.range

I regret going to the cinema. I wish I ____________.
A.would not go there
B.haven't gone there
C.hadn't gone there
D.didn't go there

The widespread use of pesticides and herbicides has led to the _______of groundwater in many parts of the world.
A.corruption
B.contamination
C.poison
D.infection

_______for farming purposes, soil must contain the minerals plants require.
A.To be good
B.Be good
C.Being good
D.That's good

Some kinds of birds are on the _______of extinction.
A.side
B.edge
C.tip
D.brink

Find out a mistake

They told to him what to do.
A.told to
B.him
C.what
D.to

Pick out the word the underlined part of which is pronounced differently from the rest
A.phoned
B.raised
C.called
D.cooked