—Sorry，sir.I haven’ t finished writing the report.
—Oh，but you________ have done it because yesterday was the deadline.
A：could
B：should
C：might
D：must
The text tells us life story of Elias, who left school and worked in a gold mine.
填上合适的单位。
①火柴棒的长度是5____。
②小名的身高130____ 。
③操场的跑道长度是400____。
④一棵杨树高12____ 。
