No one knows for certain how the first Americans arrived in _____ is now the United States.
A. which B. what
C. where D. why
Tom’s most positive quality is _____ he’s very outgoing.
A. that B. why
C. how D. whether
Liu Xiang’s breaking the world record was an exciting moment, ______ all of us will never
forget.
A. that B. One
C. it D. what
阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
When I was a little girl, every time my dad was repairing something, he 1.ask me to hold the hammer, and meanwhile, have a conversation with me. I never saw my dad drinking or taking a night out. All he did after work was taking care of his family.
I grew up and left home for college and 2. then, my dad had been calling me every Sunday morning, no matter what. Several years later I bought a house, 3. my dad painted by himself for three days in the 80-degree summer heat. All he asked was 4. me to talk to him. But I was always busy, 5. (able) to find any time for conversation with him.
One Sunday morning we had a telephone talk as usual. I noticed that my dad had forgotten some things we discussed lately. I was in a hurry, so our conversation was short. Later that day came a call 6. (say) my father was in hospital. Immediately I bought a ticket for a flight and on my way I was thinking about all the 7. (miss) occasions to have a talk with my dad.
8. the time I got to hospital, my father had passed away. Now it was 9. who did not have time for a conversation with me. I realized 10. little I know about my dad, his deepest thoughts and dreams. After his death I learned more about him, and even more about myself.
阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处填入一个适当的词或使用括号中词语的正确形式填空。
One night，at 1130 p．m.，an older African American woman was standing on the side of an Alabama highway trying to endure a lashing rainstorm.Her car had broken 1.and she desperately needed a ride.Soaking (湿透) wet，she 2._(decide) to flag down the next car.A young white man stopped 3.(help) her—generally unheard of in those conflictfilled 1960s.The man took her to 4._(safe)，helped her get assistance and put her into a taxicab.She seemed to be in a big hurry，but wrote down his address，thanked 5..
Seven days went by and 6._knock came on the man’s door7.his surprise，a giant console color TV was delivered to his home.A special note was attached.It read，“Thank you so much 8.assisting me on the highway the other night.The rain drenched (湿透) not only my clothes 9. my spirits.Then you came along.Because of you，I was able to make it to my10.(die) husband’s bedside just before he passed away.God bless you for helping me and unselfishly serving others.”
阅读下面材料，在空白处填入适当的内容（不多于3个单词）或括号内单词的正确形式。
One Sunday morning in August I went to a local music festival. I left it early because I had an appointment1. (late) that day. My friends walked me to the bus stop and waited with me_2.the bus arrived. I got on the bus and found a seat near the back, and then I noticed a man3. (sit) at the front. He_4. (pretend) that a tiger toy was real and giving it a voice. He must be5. (mental) disabled.
Behind him were other people to_6._he was trying to talk, but after some minutes_7. walked away and sat near me, looking annoyed.
I didn’t want to be laughed at for talking to him but I didn’t like leaving him8. his own either.
After a while I rose from my seat and walked to the front of the bus. I sat next to the man and introduced myself. We had_9. amazing conversation. He got off the bus before me and I felt very happy the rest of the way home.I’m glad I made the choice. It made_10.of us feel good.
