Question

--- This history book is of great value.
--- Exactly. ____________ can be enjoyed from it ____________ you have a deep understanding of it, however.

A．Nothing; unless

B．Few; till

C．Something; until

D．Little; since

Answer 1

A

解析试题分析：句意：--这本历史书很有价值。--的确如此。除非你对它有一个很深刻的理解，否则就不能很好的理解它。分析结合句意理解，只有运用连词unless适合。故选A
考点：考查连词的用法。