Don’t ______ a person only because he has failed in an examination.
| A．look at |
| B．look down |
| C．look down on |
| D．look up to |
The way you thought of _______ the experiment is very practical.
| A．carrying out | B．which to carry out |
| C．that carries out | D．to carry out |
Not only _____ our suggestions he _____ late together with us but he also started out alone at once.
| A．he refused, started | B．did he refuse, start |
| C．he did refuse, should start | D．refused he, should start |
The little boy is dirty from head to foot, because he _____in the mud all this morning.
| A．has played | B．is playing | C．has been playing | D．was playing |
In order to find out how the famous painting was stolen as soon as possible, more experienced policemen have been sent to _____ the case.
| A．look for | B．look up | C．look into | D．look through |
People today make choices of their diets______ what they believe.
| A．based on | B．basing on | C．are based on | D．being based on |