1 . Most of the evidence is destroyed.________(因此), it’s impossible to prove that the drug is harmful.（根据汉语提示单词拼写）

2 . You are a native and   __________ (因此) know your city very well. (根据汉语提示单词拼写)

3 . People have a great deal of respect for that man, ________ (因此) what he says carries weight. （根据汉语提示单词拼写）

4 . They planned to reduce staff and ________ (从而) to cut costs. (根据汉语提示单词拼写）

5 . The weak links may ________ (因此，从而) keep species from driving one another to ________ (灭绝). (根据汉语提示单词拼写)

6 . Jimmy is adopted and _______(因此) unrelated to Beth by blood. (根据汉语提示单词拼写）

7 . Most of the evidence was destroyed in the fire. __________ (因此；于是), it would be almost impossible to prove him guilty. (根据汉语提示单词拼写)