This summit produced a _____________ (突破) in the relations between the two countries.
It looks ___________ (完美的) on you.
Science ___________ (小说) is often about things that we believe may be possible in the far future.
Oil has a density lower than 1000 kg/m³,so it will ______ (漂浮) on water.
They are famous as the ___________ (自由) fighters.
The plane is now flying at an ________ (海拔，高度) of 30,000 feet.
The last day of Kwanzaa is marked by a __________（盛宴）, where a lot of people enjoy a big meal.
Segregation eventually disappeared and a new _________ (黎明)seemed to arrive.
The pains of slaves were brought from Africa by ___________ (贪婪的) slave traders.
The police ________ (逮捕) a black woman who refused to give her seat to a white man.