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careful carefully more careful more carefully
open；careful open；carefully opened；carefully opened；careful
must have to may are used to
should be more careful could be more careful should have been more careful must have been more carefully
happily; careful beautifully; carefully moving; careful beautiful; carefully
It costs! A.must may can will
should have been careful must have been careful should be careful shouldn’t have been careful
more carefully carefully careful more careful
sounds; sell is sounded; be sold is sounded; sell sounds; be sold
even though so that just as ever since
as careful as as carefully as as more careful as as more carefully as
sick ; careful enough ill , enough carefully sick , enough careful ill , enough carefully
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