_______ that it was already the fourth time that he _______ abroad.

A．So lucky he was; traveled

B．So lucky was he; traveled

C．So lucky he was; had traveled

D．So lucky was he; had traveled

义齿修复时，最好的比色时间为

A．上午8～10时，下午3～5时
B．上午8～10时，下午1～4时
C．上午9～10时，下午2～4时
D．上午10～12时，下午2～4时
E．上午9～11时，下午1～4时