More highways have been built in China,________it much easier for people to travel from one place to another.
Choosing the right dictionary depends on ______ you want to use it for.
More than a dozen students in that school _______ abroad to study medicine last year.
----Why did you leave that position? ----I ______ a better position at IBM.
Some experts demanded that children _______ time to sleep and play.
The farmer used wood to build a house to store grain.