选择 Fire may be very dangerous if we are not_____.A .enough carefully B.carefully enough C.careful enough D.enough careful

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选择 Fire may be very dangerous if we are not_____.
A .enough carefully B.carefully enough C.careful enough D.enough careful

B

此处表情态动词推测~ must、can、could may might 都表推测,其表推测的可能性由左至右依次降低。could表示某事可能发生或者可能是事实。希望帮到你哦