一 What is he interested in?
— Playing chess.
A:is; keen on
B:is; bored with
C:is; good at
近代中国与西方列强签订的某不平等条约规定:“大清国国家应允将大沽炮台及有碍京师至海通道之各炮台一律削平.”该条约是( )
September 10th is______.