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（请给出正确答案）
m of pollution in the country, but halfway in her speech, she suddenly _________ to another subject.
A) committed B) switched
C) favoured D) transmitted
答案
更多“At first, the speaker was referring to the proble”相关的问题
第1题
A.her first real success did not come until
B.her first real success came until
C.it was not until her first success came
D.it was until her first success came
第2题
A.The boy in red shorts is the first
B.The boy on red shorts is the first
C.The boy to red shorts is the first
第3题
It was the first time that such a had to be taken at a British nuclear power station.
A) presentation B) preparation C) prediction D) precaution
第6题
设有产生式：A→a｜β｜γ，且α、β、γ
ε。则在自上而下语法分析中，对A推导不带回溯的条件是_______。
A．FIRST(a)N FIRST(8)N FIRST(y)＝Ф
B．FIRST(a)N FIRST(β)＝Ф与FIRST(β)∩FIRST(y)＝Ф与FIRST(a)∩FIRST(y)＝Ф
C．FIRST(a)∪FIRST(8)∪FIRST(y)＝Ф
D．FIRST(a)∩FIRST(β)＝Ф或FIRST(β)∩FIRST(y)＝Ф或FIRST(a)∪FIRST(y)＝Ф
第7题
A.on
B. in
C. at
D. for
第8题
A.soup
B.sweet
C.vegetable
