英语选择,求个标准答案21. ________ arriving at the meeting room, Tina discovered that she had left the sample products in her office.A. By B. Through C. On D. In　22. Not until yesterday ________ anything about the new adve

英语选择,求个标准答案21. ________ arriving at the meeting room, Tina discovered that she had left the sample products in her office.A. By B. Through C. On D. In　22. Not until yesterday ________ anything about the new adve
英语选择,求个标准答案
21. ________ arriving at the meeting room, Tina discovered that she had left the sample products in her office.
A. By B. Through C. On D. In
　22. Not until yesterday ________ anything about the new advertising campaign.
　　A. I learnedB. have I learned
C. did I learned D. that I learned
　23. Miss Smith’s assistant enjoys ________ for her although she treats him very strictly.
　　A. workB. workingC. to workD. worked
　24. John had never been abroad before, ________ he found the business trip very exciting.
　　A. because B. though C. so D. while
　25. Jack said the construction of the subway would be completed in October, ________ is a great surprise to us.
A. this B. what C. that D. which

英语选择,求个标准答案21. ________ arriving at the meeting room, Tina discovered that she had left the sample products in her office.A. By B. Through C. On D. In　22. Not until yesterday ________ anything about the new adve
c一.就
B not..until 打头要倒装
A enjoy doing
d 表尽管
D非限制性

1C 2B 3B 4B 5D