[ Grammar ]
Birds usually ………..in the morning.
A. sing
B. sings
C. are singing
D. is singing

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Homophones › View___________ dogs were excited to see us.
A. Their
B. They’re
C. There
Vocabulary › View
verb; to go aboard; to make a start; to invest
A. facile
B. altruistic
C. embark
D. run
Grammar › ViewPlease be quiet. I ____ (try) to concentrate on my math homework.
A. am trying
B. are trying
C. try
D. tries
Question Tag › View
Let’s go to the movie.
A. Shan’t we?
B. Shall we?
C. Will we?
