（天津市河东区201 4年高三二模考试）2. lf you live in the country or have ever visited there, ____are that you have heard birds singing to welcome the new day.【考点】考察固定句式

It was reported that the government official expressed the deepest ______ to the families of those killed and injured in this attack.

If these trousers are too big, buy a smaller＿＿＿．

It is widely accepted that animals learn to do things because their certain acts lead to _______.

 She raised her finger to her lips as _____ for silence.