I’m very grateful for your help and hope that some day I will be able to do something for you________.[ ]

ur best to help the people when they are introuble, _______you will feel pleased and happy.

The young man lay on the sofa with his arms ________ and soon fell asleep．

In Switzerland, six miles west of Geneva,___________ a collection of laboratory buildings.

Roads in this mountain area used to be_______; people found it hard to travel here