--- Did you have a good time in the US during the Golden Week Holiday?--- ______ . Due to the temporary shutdown, a lot of national parks were closed.
The number of students in this college _____ by 10% every year.
.______ the beginning of the 19th century did scientists know that all matter is made up of atoms.
Many people believe that _______ will takes years to develop a car that does not pollute the air.
They have been woking on this project for one month. It seems they need ________ month to finish it.
________your generous help, we could not be living a happy life today.