Chinese smartphone maker Xiaomi Corp said____ it sold 18.7 million smartphones in 2013, up 160 percent year-on-year, and _____ it officially expanded to Singapore ____Jan 1, in a bid to enter the global market.

A．that, that, in

B．不填, 不填, on

C．that, 不填, in

D．不填, that ,on

人们把与丝绸摩擦过的玻璃棒所带的电荷规定为____________电荷，把与毛皮摩擦过的橡胶棒所带的电荷叫做___________电荷。