[ Grammar ]
Katherine was lying on the sofa. She was tired because she ………….. hard.
A. had been working
B. had worked
C. was working
D. worked

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Pronouns and Subject Verb Agreement › ViewHooray! Several of my drawings ________ displayed in the school art exhibit!
A. are
B. is
Comparisons › View
Her voice is ________ than her sister’s.
A. beautiful
B. more beautiful
C. beautifully
D. more beautifully