—Because he made a mistake in his work.
A:to; serious
B:at; seriously
C:with; serious
D:in; seriously
羽毛长大约____厘米.
萝卜长大约____厘米.
铅笔长大约____厘米.
一天中,陆地气温的最高值出现在____ ,最低值出现在 ____ .
—Yes,I'm ten.