[ Grammar ]
Our streets are not clean, and I strongly believe something ________ be done about it.
A. might
B. must

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Grammar › ViewThe flock of sheep _________ together on the hillside on sunny days.
A. graze (flock is singular)
B. graze (flock is plural)
C. grazes (flock is singular)
D. grazes (flock is plural)
Tenses › View
While we (sleep), our parents (watch) TV.
A. slept, watched
B. slept, were watching
C. were sleeping, watched
D. were sleeping, were watching