I received several compliments on the ______ of my skin.
A: condition
B: concentration
C: concern
D: concussion
                    A: condition
B: concentration
C: concern
D: concussion
举一反三
- I was very ( ) when I received your letter of yesterday. A: concern B: concerned C: concernking D: concerns
 - Professor Poledna received their ( ) politely. A: compliments B: complements
 - I received an encouraging ______ to my advertisement.
 - How can I go to school?My concern is ___________________ .
 - ________To do a skin test, a doctor puts venom under the skin.
 
