A _______ number of mothers with young children are stopped from undertaking paid work because they lack access to childcare.

 To solve the problem, we would appreciate it if you could give us an ______ explanation and compensate (补偿) us.

     in writing a lecture speech on AIDS prevention , she has no time to attend to her sick mother .

Sam managed to keep in________contact with his family while he was working in New Zealand.

It’s hard for the young people to imagine what _____ conditions their parents once lived under.