... a camera, and halted all passers andaimed the thing and said "Ready! now look pleasant, please," but not even this capital joke could surprise the dreary faces into anysoftening.有2点疑问：1）playing that it was a camera - 拿着这个当照相机玩。如何理解play that + 一个...
...racing (追溯) the steps along the Silk Route ___64___
brought the plants from their native habitat in Asia to come to define much of
the ___65___ (rich) of gardening in England.参考答案：56. engineering 57. functional 58. to give
59. closed 60. walks 61. the
62. favour...
The cat's eyes were jewels, gleaming out of the darkness.上句用了“out of”, 是什么意思呢？为什么不是in the darkness ?另外，请教老师out of 和 from 有何区别？例如：gleaming out of the darkness 和 gleaming from the darkness ?
In arid regions, the water tables remain at a constant level far below the surface, preventing stream-beds from filling up even during wet years.后半句表示防止河床被充满还是不被充满？
Ｗith his 100th birthday on Thursday, cards have flooded in from members of the public wanting to share their appreaciation and wish him a special day.请问老师，画线的部分是作什么成分的。the public wanting to share their appreaciation and wish him a special day是复合结构...
... basic rooftop solar heating systems that were on many homes, where energy from the sun was absorbed by a plate and then used to heat water for domestic use.