—I wonder _________ Mary has kept her figure after all these years.
—By working out every day.
A. where B. how
C. why D. If
The exhibition tells uswe should do something to stop air pollution.
A. where B. why
C. what D. which
If you swim in a river or lake, be sure to investigate is below the water surface. Often there are rocks or branched hidden in the water.
A. what B. who
C. that D. whoever
I truly believe ______beauty comes from within.
A. that B. where
C. what D. why
You have to know ________ you're going if you are to plan the best way of getting there.
A. what B. that
C. where D. who
I took my driving license with me on holiday, ________ I wanted to hire a car.
A. in case B. even if
C. ever since D. if only