题目内容

These ____ are cooking a meal in the kitchen.

A. cooker
B. cook
C. cooks

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The keyboard operators are typing ____ on the computers.

A. letters
B. letter
C. a letter

Tim is ____ a pencil.

A. sharpen
B. sharpening
C. sharp

cl___d n.云

A. au
B. oun
C. ou

s__n n.太阳

A. u
B. o
C. i

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