4.        ，the expedite system shall remain in operation until the end of the match. (introduce)

轮换发球法一经实行，将一直使用到该场比赛结束。

3.          to pick me up at four o，clock and take me to the airport? (convenient)

你方便四点钟接我并把我送到机场吗？

2. Studies show that only with thorough and proper preparation           you have been working towards. (seize)

研究表明，只有经过充分适当的准备，你才能抓住那个你一直为之努力的机会。

1 . He was so deep in thought thinking of the problem         the tree without noticing it. (knock)

他思考问题太投入了，以致一不留神撞到了树上。

(   ) 10. Technology is now more a part of us than ever before―almost an       of the human body at this point.

A. expense    B. exchange    C. exception    D. extension 

(   ) 9. BP will continue to make sure that the costs       with oil spill cleanup in the Gulf of Mexico are paid.

A. fascinated    B. covered    C. occupied    D. associated

(   ) 8. To make the students understand the problem, the teacher tried to explain it,but the explanation just did not        to the class.

A. get through    B. get around    C. go over    D. get across

(   ) 7. Believe it or not, we expected the path to end      ，but we eventually found that it traced through the trees.

A. mildly    B. abruptly    C. absolutely    D. sharply

(   ) 6. As I grew up in a small town at the foot of a mountain, the visit to the village      scenes of my childhood.

A. called up    B. called for     C. called on    D. called off

(   ) 5. The new movie,Pirates of the Caribbean 4is well received and lives up to the      which is established by the first 3 series.

A. expectation    B. reputation      C. contribution    D. motivation