怎样填?It is suggested that the question---------(decide) at once.

问题描述:

怎样填?It is suggested that the question---------(decide) at once.
用所给动词的正确形式填空.

be decided.
suggest做"建议"讲,后接从句句式应为:
suggest that sb.(should) do sth.
其中do为动词原型,should可以省略.
此句中question为物,后应该用被动,即be decided.