61. The teacher is devoted ______ teaching in the countryside in his life. 　

60. Whether we will have the match today depends_______ the weather.

59. This morning they checked______ at a hotel and will check out tomorrow.

58. We must keep learning new things so that we can keep pace ________ the times. 　

57. Whenever he comes to Beijing, he calls _________ me at my house. 　

56. After hearing the news, some burst ________ laughter, while others burst ________ tears. 　

55. Last night his house was broken _________, and many valuable things were found stolen.　

54. After a heated discussion, we agreed _________ the policy.　

53. Please walk slowly. I can’t keep up ________ you.　

52. Please go to your teacher to ask ________ his help if you meet with any difficulties.