The beautiful song ________ me of those happy old days we had spent together.
I felt very strange __________________.
________ had been done, the working efficiency of the employees still remained low.
_______ as “a class of one ”, independent learning enabled you to study at your own pace.
______ it be true that we will have to wait for 3 hours in a line to get into the French Pavilion in the Expo Site?
Nowadays, many people walk to work _________ the Copenhagen Conference calling for living a low-carbon lifestyle to cope with global warming.