Built mainly on natural resources , the prosperity of the city was _______ and its economy almost collapsed when coal prices began to fall in 2012.
The way you thought of _______ the experiment is very practical.
Not only _____ our suggestions he _____ late together with us but he also started out alone at once.
The little boy is dirty from head to foot, because he _____in the mud all this morning.
In order to find out how the famous painting was stolen as soon as possible, more experienced policemen have been sent to _____ the case.
People today make choices of their diets______ what they believe.