—Will you attend the meeting this afternoon? —But I ________ told anything about it.
At first he refused to admit his guilt but when he was shown the evidence he ______ and confessed (坦白).
________with the help you gave the blind man, mine is not worthy of being mentioned at all.
It is usually warm in my hometown in March, but it ______ be rather cold sometimes.
The atmosphere of the earth ______ us from the strong sun light.
Don’t disturb me. I_______ letters all morning and have written ten so far.