October 24, 1860, the Qing government and the Britain sighed "the treaty ofBeijing", ___ put an end to the second Opium war.
— Did you go to the lecture by the visiting professor? — No. I ______ it, but I've been busy taking care of my grandma in hospital these days.
This still leaves the question of ______ local public services should be improved in the next five years.
The parents didn't tolerate their kids' rudeness at the party, nor ______ themselves to be disobeyed.
Every morning I get up at 6:00 because I have two dogs ______ at the door for me to take them out for the routine walk.
Guess what! I came across my primary school science teacher this morning, ______ I have lost touch for almost 20 years.