2道中学英语选择题,英语达人进1.Which of your two brother 空缺 been abord.空缺

2道中学英语选择题,英语达人进
1.Which of your two brother 空缺 been abord.
空缺 Of them.JUDY has been toJapan.And Mark has been to the USA
A:has;BOTH B:has;all C:have;either D:have;Neither
我看了答案选A,为什么第一个空不填Have呢?
不是Has用于第三人称单数码?
2.Can you tell me why 空缺
A:do you go to tibet
B:did you go to tibet
C:are you goingto tibet
D:you are going to tibet
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