The task is too much for him, so he can’t continue ______any longer. He must get some help.

 After years of changing residence (住处) and promotion, Madelyn moved to a new city and _____ became vice-president of a local bank.

After two years’ research, we now have a __________ better understanding of the disease. 

____ most children nowadays are the only chidren, they tend to be more self-centered．

-She often gets up late,    when she has no classes in the morning.