Paragraph 4 (lines 24-31) informs that UMass researchers produce green gasoline by 
According to this text, it might be said that corn ethanol and soy biodiesel have 
The text says that research on green gasoline has 
The title of the text, “Money Doesn’t Grow on Trees, But Gasoline Might”, refers to the 
According to the text, judge the following items.
"who" (L.7) can be correctly replaced by whom.
Judge the following items according to the text.
The modal “must” (l.10) expresses the idea of obligation.
Judge the following items according to the text.
The word “biggest” (l.1) is the comparative of superiority of the adjective big.
Judge the following items according to the text.
The element “if” (l.7) could be correctly replaced by unless.
Judge the following items according to the text.
The element “if” (l.7) could be correctly replaced by unless.
Taking into consideration the text above, judge the following items.
The modal “should” (l.28) is used to express an idea of conditionality.
