Correct

齐声

/ qíshēng / 
Strokes

Definition

all speaking together/in chorus

Example

As an Adverb

in chorus/unison

1
Qíshēng
齐声
lǎngdú
朗读

read in chorus

2
Qíshēng
齐声
kàngyì
抗议

be unanimous in protesting

3
Qíshēng
齐声
huídá
回答

answer in chorus

4
Qíshēng
齐声
huānhū
欢呼

cheer in unison

5
Qíshēng
齐声
hècǎi
喝彩

acclaim in chorus