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
Don’t disturb me. I_______ letters all morning and have written ten so far.
A．have written B．am writing C．was writing D．have been writing
