_____ your advice, I would have had no trouble with my papers.
| A．Had I followed | B．If I followed | C．If I have followed | D．Once I followed |
The evidence has ______ the first witness’ story.
| A．confused | B．accumulated | C．attached | D．confirmed |
In these years, the shortages of water has become a ______ problem.
| A．global | B．historical | C．chemical | D．local |
---______ he have been chosen as captain of our school football team?
---Yes, he______. Can’t you see he’s wearing an armband?
| A．Can; can | B．Must; must have | C．Can; must have | D．Must; must |
China has been pushing the reform of public hospitals______ all its citizens.
| A．in charge of | B．for the purpose of | C．in memory of | D．for the benefit of |
My wife ______the night shift when my plane ______. That’s why no one is to meet me at the airport today.
| A．will have worked; has arrived | B．was working; arrived |
| C．will be working; arrives | D．is working; is arriving |