-Hello, may I speak to Mr. Smith?-Sorry, he isn't in. He__________ the office.
A:has been to
B:has gone to
C:has been away
一只大熊猫刚出生时的体重约为0.102千克,等到成年时的体重约为100.05千克.0.102读作:____;100.05读作:____.
生物技术的迅猛发展挑战了原有的社会伦理道德秩序,引起了激烈的争论.