20.________ by many potential customers,the salesman had to gather his courage and sell the product in different ways.( )
A. | Having denied | B. | Denying | ||
C. | Being denied | D. | Having been denied |
19.It rained heavily overnight and not until this morning __________.( )
A. | had it stopped | B. | did it stop | C. | stopped it | D. | it stopped |
18.Wechat intends to radically change the way ______ people use mobilephones.( )
A. | / | B. | which | C. | why | D. | who |
17.She stormed into the boss'office ________ about her co-worker's behavior.( )
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A. | complaining | B. | complained | ||
C. | having complained | D. | to complain |