A:to send
B:to be sent
C:to have been sent
D:to have been sending
(2016•黑龙江)俄罗斯的“母亲河”是( )
Ⅰ.体验H2O2分解的实验意义
John is 140 centimeters tall. Peter is 130 centimeters tall .So John is _____ than peter