21. You’d better not disturb me, I ____ letters all the morning and have written six so far.

36. The purpose of the Linkup’s investments is to ____.

62. 支付宝致力于为其成员提供“简单、安全、快捷”的在线支付方式。

58. 她在截止日期的前一天才开始写文章。

(  )14. The wedding breakfast will be prepared by the Grand Hotel.

46.Similarities between money and time: Both should be spent   46  to get a good return. 

65. 我们可以向你保证，本公司的产品质量远超国际标准。

64. 微信已逐渐成为人们最喜欢的交流方式。

42. Where did KamerMaker begin printing plastic furniture and walls several weeks ago?

38. What kind of businesses will benefit from Linkup. org’s second project?

3.

43. What is the weakness of the 3D printer mentioned in the passage?