The man kept silent in the room unless _______.
#80358
A
spoken
B
speaking
C
tospeak
D
spokento
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 So loudly _____ that ______ hear her clearly.
#80431
A
did she speak; could everyone
B
did she speak; everyone could
C
she spoke; could everyone
D
she spoke; everyone could
These problems, ________, will seriously affect the growth of teenagers and even the nation’s future.
#80148
A
not if solved properly
B
if solved properly
C
if not solved properly
D
not if properly solved
While_________in Britain, he made friends with the natives there.
#80765
A
working
B
worked
C
he works
D
he is working