He tried to _____ his nervousness:

He tried to _______ his nervousness with smile when he made the speech, which made him much more nervous

A、cover
B、relax
C、diminish
D、vanish

He laughed to cover his nervousness.

A、the outside of a book or a magazine
B、to put or spread a layer of liquid, dust, etc. on sb/sth
C、to place sth over or in front of sth in order to hide or protect it
D、to include sth; to deal with sth

He’ll ____ his nervousness once he's on stage.

A、get away
B、get off
C、get through
D、get over

The tremor in his voice _____ his nervousness when he answered the question during the interview.

A、

betrayed

concealed

trapped

released