四、基础知识 (共l5小题；每小题l分，满分l5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。

41. I can’t find my book , could you please    ▲   （借）me yours ?

42. Every    ▲    (月)，I visit the home for the elderly as a volunteer.

43. Have you ever watched the    ▲    (升高) of the national flag at Tian'anmen Square?

44. All the members should work    ▲    (密切地) with each other in a team. Many hands make light work.

45. Do you want to know the    ▲    (真相）of the car accident?

B) 根据句子意思，用括号中所给单词的适当形式填空。

46. ― What do you think of Ding Junhui?

    ― He is the    ▲    (proud) of our country.

47. We have difficulty    ▲    (solve) the maths problems.

48. Don’t take those flowers away. They are that    ▲    (visit).

49. Four    ▲    of the world’s telephone calls are made in English. (five)

50. We need to clean our room first and    ▲    a little later. (they)