The research is so designed that once________nothing can be done to change it.
| A．begins | B．having begun |
| C．beginning | D．begun |
（届北京市东城区普通校高三3月联考英语试卷）
Prices of daily goods ___________ through a computer can be lower than store prices.
| A．are bought | B．bought | C．been bought | D．buying |
（届福建省泉州市高三质检英语试卷）
_______ the right to correct his difficult question，the teacher of English was pleased and praised me in front of the class.
| A．Having given | B．Having been given |
| C．To be given | D．Giving |
（届江苏省淮州中学高三3月份模拟英语试卷）
The new spokesperson of China’s Foreign Ministry, Ms Hua Chunying is reported _______ in Jiangsu Huaizhou High School.
| A．to study | B．to have studied | C．to have been studied | D．to be studying |
（届安徽省合肥市高三第二次模拟考试英语试卷）
Every morning I get up at 6:00 because I have two dogs ______ at the door for me to take them out for the routine walk.
| A．to wait | B．wait | C．waited | D．waiting |
（届北京石景山区高考一模英语试卷）
---Who’s the man talking to our teacher?
---A professor_____a visit our school.
| A．pays | B．to pay | C．paid | D．paying |