A．What perfectly protected B．How perfect protected C．How perfectly protected D．What perfect protected
单项选择题Henry often helps look after Granny Wang, but （）.
A. seldom is George B. seldom George does C. seldom does George D. seldom looks George after Granny Wang
单项选择题How was （） they discovered the entrance to the underground palace Totally by chance.
A. it that B. he that C. it when D. he which
