TCR-CD3复合物分布于所有成熟D细胞表面，在该复合物中CD3分子的主要作用是（）。

A.特异性识别抗原肽-MHC分子复合物

B.与LFA-3结合

C.传递T细胞激活信号

D.淋巴细胞归巢受体

E.参与再次免疫应答

第二节 完形填空（共20小题；每小题1.5，满分30分）

阅读下面短文，从短文后各题所给的四个选项（A、B、C和D）出可以填入空白的最佳选项，并在答题卡上将该项涂黑。

One summer night, on my way home from work I decided to see a movie. I knew the theatre would be air-conditioned and I couldn’t face my 1_____ apartment. Sitting in the theatre I had to look through the 2_____between the two tall heads in front of me. I had to keep changing the 3____every time she leaned over to talk to him. 4_____ he leaned over to kiss her. Why do Americans display such 5____ in a public place? I thought the movie would be good for my English, but 6_____ it turned out, it was an Italian movie. 7____ about an hour I decided to give up on the movie and 8_____ on my popcorn. I’ve never understood why they give you so much popcorn! It tasted pretty good, 9____. Afetr a while I heard 10____ more of the romantic-sounding Italians. I just heard the 11____ of the popcorn crunching(咀嚼) between my teeth. My thought started to 12 _____. I remembered when I was in South Korea, I 13 ____ to watch Kojak on TV frequently.

He spoke perfect Korean-I was really amazed. He seemed like a good friend to me, 14____I saw him again in NewYork speaking 15_____English instead of perfect Korean. He didn’t even have a Korean accent and I 16_____like I had been betrayed(背叛). When our family moved to the United States six years ago, none of us spoke any English. 17____we had begun to learn a few words, my mother suggested that we all should speak English at home. Everyone agreed, but our house became very 18_____ and we all seemed to avoid each other. We sat at the dinner table in silence, preferring that to 19____ in a difficult language. Mother tried to say something in English but it 20_____ out all wrong and we all burst into laughter and decided to forget it! We’ve been speaking Korean at home ever since.

小题1:.

A．warm

B．hot

C．heated

D．cool小题2:.

A．crack

B．blank

C．break

D．opening小题3:.

A．seat

B．view

C．space

D．angle小题4:.

A．while

B．whenever

C．or

D．and小题5:.

A．attraction

B．attention

C．affection

D．motion小题6:.

A．since

B．when

C．what

D．as小题7:.

A．Within

B．After

C．For

D．Over小题8:.

A．set

B．chew

C．fix

D．taste小题9:.

A．too

B．still

C．though

D．certainly小题10:.

A．much

B．any

C．no

D．few小题11:.

A．voice

B．sound

C．rhythm

D．tone小题12:.

A．wonder

B．imagine

C．wander

D．depart小题13:.

A．enjoyed

B．happened

C．turned

D．used小题14:.

A．until

B．because

C．then

D．therefore小题15:.

A．false

B．informal

C．perfect

D．practical小题16:.

A．felt

B．looked

C．seemed

D．appeared小题17:.

A．While

B．Before

C．If

D．Once小题18:.

A．empty

B．quiet

C．noisy

D．calm小题19:.

A．telling

B．shouting

C．saying

D．speaking小题20:.

A．worked

B．got

C．came

D．made