_____ 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 woman is always looking forward to ________ a rich life.
| A．live | B．living | C．to live | D．lived |
Though I am improving my study, I still have a long way to go __________ some of my classmates.
| A．to compare with | B．to compare to |
| C．comparing with | D．compared with |
The traffic on the main streets has a longer green signal than __________ on the small ones.
| A．one | B．this | C．that | D．it |
Alice received an invitation from her boss，__________ came as a surprise.
| A．it | B．that | C．which | D．he |
Paper is __________ great Chinese contribution to human civilization.
| A．a | B．the | C．不填 | D．an |