Is this the reason ______ at the meeting for his carelessnessin his work

The father as well as his three children____ skating onthe frozen river every Sunday afternoon in winter[ ]

In the future, the US policy is likely to be strongly determined by internaldevelopments in a number of key states, _______China and Russia [ ]

Yao Ming works hard on his English and ________

So hard did he work that he __________made himself ill for a whole week