1， 8， 15， 22， 29，( )
A．39
B．36
C．47
D．40
参考答案：B
His wife ___ to catch the first train but she was too late.
A．is hoping
B．had hoped
C．has hoped
D．would hope
攻丝时每正转0.5～1圈后，应反转1/4～1/2圈，是为了（）
