Mr. Li doesn’t think that all bad language should be allowed. In his opinion, there are ______ that should be kept up.
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.