I found ______ not very difficult to keepaway from the A/H1N1 Flu.

The shoes were worn out, what’s more, they aren’t worth _____.

The governments should the use of new types of energy to make a greener world.

______ of the day, we were tired. We had to take a taxi to go back home.

11.We should consider the students’ request the school library provide more books on popular science