So far we have done a lot to build a low-carbon economy, but it is________ ideal. We have to work still harder.

Till now the problem is far from ______.

Excuse me, how far is the airport from here? （）

--Excuse me, how far is the airport from here? --（）

We have just received a message from shore（）assistance is on the way.

We can learn from the text what the problem really matters is ( )．

A requirement is simplya statement of what the system must do or what characteristics it needs to have. Requirements written from the perspective of user and focus on user needs are called _( )_.

读网络教育学院非英语专业和非艺术类专业专升本的学生报考统考，除计算机应用基础外，还需报考（）

—I regretted what I have done.—_____ gone is gone. _____ no use regretting it any more.

What can we infer from Paragraph 2?

What can we infer from Paragraph 4?

Practice 3　　We have come to dedicate a portion of that field as a final resting-place for those who here gave their lives that that nation might live. It is altogether fitting and proper that we should do this.　　But, in a larger sense, we can not dedicate, we cannot consecrate, we cannot hallow this ground. The brave men, living and dead, who struggled here, have consecrated it, far above our poor power to add or detract. The world will little note, nor long remember what we say here, but it can never forget what they did here. It is for us, the living, rather, to be dedicated here to the unfinished work which they who fought here have thus far so nobly advanced. It is rather for us to be here dedicated to the great task remaining before us.. that from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion; that we here highly resolve that these dead shall not have died in vain; that this nation, under god, shall have a new birth of freedom; and that government of the people, by the people, and for the people, shall not perish from the earth.（The Gettysburg Address—Abraham Lincoln）