四、填空（共15小题；每小题1分，满分15分）

A）根据括号中所给的汉语写出单词，使句子意思完整正确，并将答案填写在答题卡标号为41―45的相应位置上。

41．Simon, don’t worry too much. We all think you can make it by    ▲    (自己).

42．Chang’e 4 will send wonderful pictures back to us when it    ▲   (到达)the moon in the year 2018.

43．Each of us felt   ▲    (口渴的) when seeing the watermelons on the table.

44．American     ▲    (发明家)Thomas Edison began making short action pictures at the beginning of the 20^th century.

45．You cannot    ▲    (想象) how much difficulty I had communicating with such a person.

B）根据句子意思，用括号中所给单词的适当形式填空，并将答案填写在答题卡标号为46―50的相应位置上。

46．________ (luck), we missed the last bus and had to walk the whole way back to the town center.

47．   ▲   (far) information is necessary for you to work out the problem.

48．Youyou Tu became the first Chinese that ________ (win) a Nobel Prize for medicine on October 5^th 2015.

49．People who are in their ________ (thirty) care more about their career than their own life.