W: What did Nick think of the English Evening last weekend
M: He hasn’t been around this week.

What does the man imply（）

A. difficulties encountered in writing history of any kind
B. a comparison of varions approaches and attitudes to history as a science
C. a summary of functions of writing history
D. the improbability of writing and convincing and detailed history

A. Building roads without machinery was almost impossible 2,000 years ago.
B. It took a long time for the Romans to build roads by hand.
C. People still use the old Roman way of building roads.
D. Stones were used only in roads in Asia.