题目内容：

More and more people are signing up for Yoga classes nowadays,______advantage of the health and relaxation benefits.
A .taking
B .taken
C.having taken
D.hacing been taken
Do let your mother know all the truth.She appears _______everything.
A.to tell
B.to be told
C.to be telling
D.to have been told
With a lot of difficult problems _______,the newly-elected president is having a hard time.
A.settled
B.settling
C.to settle
D.being settled