—They moved here soon after their son was born.
A：when would the Greens move here
B：when the Greens moved here
C：the Greens would move here
D：when the Greens would move here
____ he ____ on his coat and leave home without a word?
观察下列算式：21=2，22=4，23=8，24=16，25=32，26=64，27=128，28=256，…，则89的个位数字是（ ）
