探究影响浮力大小因素的实验中，同学们提出了下列4种猜想：

猜想1：浮力的大小与液体的密度有关；

猜想2：浮力的大小与物体浸入液体中的体积有关；

猜想3：浮力的大小与物体的形状有关；

猜想4：浮力的大小与物体所受的重力有关。

下列划线的字注音正确的一项是（     ）

C

    There are many kinds of clubs in the US middle schools, such as the music club, the sports club, the chess club, the swimming club… But do you know the homework club? It is a popular club in many US middle schools. More and more students spend their afternoons in the homework clubs. The US middle school students need a quiet place to study in. But games, computers and TVs are all around them at home. So the homework club is just for them to do their homework. The club is quiet and it's good for students to study in it. Some teachers are there, too. They can answer students' questions and help with their homework. If students finish their homework on time, they will get a snack. It's always children's favorite food. Then they can go home and play games or watch TV happily.

补写出下列名句名篇中的空缺部分。

①大江东去，____。故垒西边，人道是，____。 

(苏轼《念奴娇·赤壁怀古》)

②五步一楼，十步一阁。____，____。 

(杜牧《阿房宫赋》)

③句读之不知，惑之不解，或师焉，或不焉，____，____。 

(韩愈《师说》)

④时维九月，序属三秋;____，____。 

(王勃《秋日登洪府滕王阁饯别序》)