A. very expensive
B. very easy
C. to face difficulty bravely
D. very rarely

A. very easy
B. very rarely
C. very expensive
D. to reveal a secret

A. very easy 
B. very rarely
C. to reveal a secret
D. to be exactly right

A. to reveal a secret
B. to be exactly right
C. to start a conversation
D. very rarely

A. to reveal a secret
B. to be exactly right
C. to start a conversation
D. worry about the past

A. to start a conversation
B. worry about the past
C. to be exactly right
D. try very hard

A. worry about the past
B. try very hard
C. to start a conversation
D. make a situation worse

A. try very hard
B. worry about the past
C. make a situation worse
D. go to sleep

A. make a situation worse
B. Try very hard
C. go to sleep
D. making a wrong assumption

A. go to sleep
B. make a situation worse
C. making a wrong assumption
D. avoid the main point