Vocabulary
Plurality
Fill in the blank
100

公鸡 

rooster

100

apple 

apples

100

____ you all right?

Are

200

西瓜

watermelon

200

tooth

teeth

200

These ____ my cases.

are

300

西柚

grapefruit

300

dolphin

dolphins

300

This ___ my case.

is

400

只,仅仅

only
400

box

boxes

400

___ is his ___ (书)

This is his book.

500

仍,仍然

still
500

sheep

sheep

500

____ are his ____ (书).

 These are his books.