It was the building of the rail network from the west to the east coast ________ brought even larger numbers to California in the 1860s.
Life is___,but there is no limit_____.
They stopped fighting but stood there, ____each other without saying anything.
The boy fell asleep where he ______,without undressing.
Some countries are increasing their use of natural gas, and other forms of ______.
Liping has never gone to Japan, but he speaks Japanese____ he were Japanese.