Heroes ______ their life ______ becoming the best they can be, whether it is President of the United States, a mother, or a firefighter.

There is a(n) _______ bus service into the center of town, which makes it much easier for farmers to go to sell their vegetables there.

We _______ two hours in doing our homework everynight.

.Not one in one hundred children exposed to the disease ______ likely to develop it

At first she ________ like maths，but now she _________.