B. orchestra
The orchestra is a group of musicians who play together, so the correct word is "orchestra."

B. Composers
Hoang Long and Pham Tuyen are the people who wrote songs, so the correct word is "composers."

C. poet
Nguyen Dinh Chieu is known as a poet, so the correct word is "poet."

C. joining
"Joining" is the correct form after "What about," as it suggests an activity someone can participate in.

B. ropes
In traditional water puppetry, they often use ropes to control the puppets, so "ropes" is the correct answer.

B. artistic
The correct form to compare qualities is "artistic" (adjective), so the correct answer is "artistic."

The orchestra performed its final concert of the season yesterday.
Correct answer: B. orchestra

Composers Hoang Long and Pham Tuyen wrote many songs for children.
Correct answer: B. Composers

Nguyen Dinh Chieu was known as one of the most famous poets in Viet Nam.
Correct answer: D. poets

What about joining the art club this summer?
Correct answer: C. joining

They usually use ropes under the water to control the puppets and make them move on the water.
Correct answer: B. ropes

My daughter is more artistic than my son.
Correct answer: B. artistic