. Yesterday I missed my feet on the stairs and had a bad fall. Luckily it was nothing serious ___.
The United States and England are both ____________countries.
We have made ________clear that we are strongly against smoking in the office.
The beauty of the city ________its magnificent buildings.
English,as well as Chinese and math ________of great importance now.
Without ________electricity,how can we search for information on ________Internet?