Fill in the correct form of sein for each sentence. Pay attention to whether the noun is singular or plural.
Der
The friend is nice, and the (female) friend is sympathetic.
Das
The meeting is important, and the parties are fun.
Der
The colleague is helpful, and the colleagues are friendly.
Ein
A classmate is intelligent, and several classmates are talented.
Die
The sister is reliable, and the brothers are brave.
Das
The girl is sweet, and the boys are athletic.
Ein
An acquaintance is reliable, and the acquaintances are honest.
Der
The neighbor is old, and the neighbors are young.