TOEFLReading
Complete the Words
补全段落中缺失的字母。每个下划线（_）代表一个缺失的字母。请为每一项输入完整的单词。
主题： Dating ancient buildings with tree rings已填 0 / 10 空
Tree rings can help archaeologists work out when ancient wooden buildings were constructed. Because (1)tr___ add (2)o__ ring (3)ea__ year, (4)a__ because (5)ri__ width (6)dep____ on (7)cli____, trees (8)fr__ the (9)sa__ region (10)sh___ a recognizable pattern of thick and thin rings. By matching the rings in an old roof beam to a long master sequence, researchers can often identify the exact year in which the tree was cut down. This method has been used to date sites ranging from medieval churches to prehistoric villages.
Words to complete:
#1
tr___
#2
o__
#3
ea__
#4
a__
#5
ri__
#6
dep____
#7
cli____
#8
fr__
#9
sa__
#10
sh___