6月大学英语四六级作文重点句式（四）

　　提出建议的常用句子格式

　　1：It is high time that we put an end to the .

　　2：There is no doubt that enough concern must be paid to the problem of

　　3：Obviously ,if we want to do something it is essential that

　　4：Only in this way can we

　　5：Spare no effort to + V