________ is know to us all is that the old worker, for _______ life was hard in the past, still works hard in his seventies.
If a substance has a higher density, ____ 2, 000kg/ m³, it will not float on water.
Had it not been for the fact that she_____ in the leg, she might have passed the exam.
---What do you think of Jack? ---He is not a bad boy. ______, he’s a pretty good one.
_____ a mobile phone can you ring____ you want to talk with anywhere.
---Was it midnight_____ the heartbreaking news came_____ he passed away? ---I am afraid so.