請翻譯下面的句子：

　　1) It took the boy three hours to finish his homework.(那個(gè)男孩花了3小時(shí)才寫完作業(yè)。)

　　2) It takes less than 4 hours to get to Shanghai by train from Nanjing.(從南京乘火車到上海只要不到4小時(shí)。)

　　3) 他花了4天時(shí)間才走出密林。(It took him 4 days to go out of the forest.)

　　4) 照顧一個(gè)生病的老人要花許多時(shí)間。(It will take a great deal of time to look after a sick old man.

　　9. On the average the water is a little more than two miles deep， but in places it is much deeper.

　　on the average在句子中的意思是“平均而言”。例如：

　　1) On the average， they drove 70 miles an hour.(他們平均每小時(shí)行駛70英里。)

　　2) On the average， they spend 20 yuan on food every day.(他們平均每天花20塊錢吃飯。)

　　a little 在句子中修飾more，表示程度，意思是“一點(diǎn)兒，稍許”。much在句子中修飾deeper，也表示程度，加強(qiáng)形容詞比較級(jí)，意思是“…多”。例如：

　　1) I feel a little cold.(我覺得有點(diǎn)冷。)

　　2) He spent a little more than 20 yuan yesterday.(昨天他花了20塊多一點(diǎn)兒。)

　　3) I feel much better now.(我現(xiàn)在感覺好多了。)

　　4) She is much more careful this time.(她這一次細(xì)心多了。)