1. It must be pointed out that it is one of our basic State policies to control population growth while raising the quality of the population。

    2. It is (has been) estimated that the world's population could reach 6 billion by the end of the century。

    3. It must be kept in mind that there is no secret of success but hard work。

    4. It can be seen from this that there is no difficulty in the world we can overcome.

    5. As is known man is the product of labour。

    6. It is a common saying that man who has a settled purpose will surely succeed。

    7. It is clear that the enemy has no desire for peace。

    8. It is hard to imagine how Edison managed to work twenty hours each day。

    9. It's hard to say whether the plan is practicable。

    10. There is no doubt that you will be helped by others if you have any difficulties.

    》》更多精彩冲分课程：
    四级冲刺班（必胜课教师团）  四级冲刺班（高分战队）
    四级冲刺班（优质四级）     六级冲刺班（东方六必治）
    六级冲刺班（笑傲六级）      六级冲刺班（六神战队)

(责任编辑：田学江)