One should take ______ of his strengths to make up for his weaknesses.
A. advantage B. benefit
C. profit D. use
The top students ______ at the assembly today were awarded a pen and a notebook each.
A. to praise B. praised
C. being praised D. to be praised
Soon after the war，one family who lived in Pennsylvania ______ me and brought me up.
A. had adopted B. adopted
C. would adopt D. has adopted
In his victory speech，______ before a huge crowd of his supporters，Obama declared that “change has come to America”．
A. having delivered B. to be delivered
C. delivering D. delivered
Despite barriers and hardships，they ______ the research on cloning tissues.
A. come up with B. catch up with
C. push ahead with D. put up with
假设你叫李华，你的一个朋友John刚从美国归来，邀请你参加本周日在他家举办的朋友聚会，但你不能参加，请你根据以下要点给他写以封电子邮件：
1.表达想参加的意思；
2.忙于准备考试；
3.由于感冒，身体不适；
4.表示歉意并另约时间。
注意：可适当添加细节以使行文连贯；字数100字左右，开头和结尾已给，不计入总词数。
Dear John,
I’m extremely sorry to tell you that I am unable to go to your party this Sunday.
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Yours truly,
Li Hua
