问题
选择题
—_____did the space flight last?
—Twenty-one hours. [ ]
A.How many
B. How long
C. How soon
D. How often
答案
答案：B
搜题请搜索小程序“爱下问搜题”
—_____did the space flight last?
—Twenty-one hours. [ ]
A.How many
B. How long
C. How soon
D. How often
答案：B