No one tells us______, so we need your help.
| A．how we should do | B．what should we do |
| C．how to do it | D．what to do it |
It was a pity that the great writer died ______ his work unfinished.
| A．for | B．with | C．from | D．of |
At first he refused to admit his guilt but when he was shown the evidence he ______ and confessed (坦白).
| A．broke down | B．lay down | C．got down | D．put down |
________with the help you gave the blind man, mine is not worthy of being mentioned at all.
| A．Compare | B．To compare | C．Comparing | D．Compared |
It is usually warm in my hometown in March, but it ______ be rather cold sometimes.
| A．must | B．can | C．should | D．would |
The atmosphere of the earth ______ us from the strong sun light.
| A．prevents | B．keeps | C．stops | D．protects |