6月大學英語四六級作文重點句式（四）

　　提出建議的常用句子格式

　　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