. The river, ____ are covered with trees, is very long.

Zhalong ________ food and cover for a lot of wildlife.

Reading aloud is the best way English.

Once a student is caught in the exam, he will be severely punished.

填入下面横线处的句子，与上文衔接最恰当的一句是 （ ）据统计，迄今为止，大约有500人成功地登上了珠穆朗玛峰顶，但也大约有500人却在攀登过程中献出了宝贵的生命。这个统计数字不折不扣地表明：__________