★、★★、★★★題難度系數(shù)逐級(jí)提升，學(xué)生可根據(jù)實(shí)際自主選做。

一、圈出句中的錯(cuò)別字，并改正在括號(hào)里?！?/p>

在隧道的未端，一只略顯苯重的大鳥(niǎo)張開(kāi)羽冀飛向藍(lán)天，似乎是要去開(kāi)避新的領(lǐng)地。

（ ）（ ）（ ）（ ）

二、按要求完成句子練習(xí)。★★

1.恐龍的一支經(jīng)過(guò)漫長(zhǎng)的演化，最終變成了凌空翱翔的鳥(niǎo)兒。（加點(diǎn)詞語(yǔ)可以去掉嗎？為什么？）

________________________________________________________________________________________________________________________________________

2.以“花園里的花各有特色”為開(kāi)頭，仿照“小練筆”，用總分結(jié)構(gòu)及對(duì)比列舉的方式寫(xiě)一段話(huà)。

________________________________________________________________________________________________________________________________________" " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " " "

三、根據(jù)課文內(nèi)容填空?！?/p>

課文先介紹了一種科學(xué)假說(shuō)，即：_____________________________________________________。然后圍繞這一假說(shuō)介紹了相關(guān)的科學(xué)依據(jù)：" " " " __________________________________________________________________________________________________________。作者還用充滿(mǎn)想象力的語(yǔ)言描繪了"_____________________________________________________的過(guò)程。