根据下列句子的句意、汉语提示或英语解释,写出空白处所缺单词的正确形式;每空一词.
After so long without any word from David, Mary was starting to (give up) hope.
After discussing it for two days, they haven't reached an (agree) yet.
On my last birthday, my brother bought (I)a book as a gift.
Simon is an interesting person and he gets excited (easy).
Smoking does harm to h .We'd better give it up.
A he is only 6 years old,he can swim well.