小题1:This summit produced a _____________ (突破) in the relations between the two countries.
小题2:It looks ___________ (完美的) on you.
小题3:Science ___________ (小说) is often about things that we believe may be possible in the far future.
小题4: Oil has a density lower than 1000 kg/m3,so it will ______ (漂浮) on water.
小题5:They are famous as the ___________ (自由) fighters.
小题6:The plane is now flying at an ________ (海拔，高度) of 30,000 feet.
小题7: The last day of Kwanzaa is marked by a __________（盛宴）, where a lot of people enjoy a big meal.
小题8:Segregation eventually disappeared and a new _________ (黎明)seemed to arrive.
小题9:The pains of slaves were brought from Africa by ___________ (贪婪的) slave traders.
小题10:The police ________ (逮捕) a black woman who refused to give her seat to a white man.
小题1:breakthrough
小题2:perfect
小题3:fiction
小题4:float
小题5:freedom
小题6:altitude
小题7:feast
小题8:dawn
小题9:greedy
小题10:arrested
题目分析：
小题1: 作宾语，故需要用名词形式
小题2:look是系动词，故需要用形容词作表语
小题3:这里作主语，故用名词形式
小题4:情态动词之后用动词原形
小题5:freedom fighters是专有名词，意思是自由战士
小题6:冠词之后应该用名词
小题7:冠词之后应该用名词
小题8:这里and连接了两个并列句，and之后的句子，空格处作句子的主语，故用名词形式
小题9:需要用形容词修饰名词
小题10:定语从句中who refused to give her seat to a white man.用的是一般过去时，可判断出这是发生在过去的事，故用一般过去时。
点评：做这类题，不但要根据句意，选择正确意义的词、词组及句型，还要根据具体语法和语境，选择适当的时态、语态及使用正确的词形。