单项选择题

Foreign students find certain structures particularly difficult；______，teachers need a reliable source of practice material to put these points across effectively.（）

A．so that
B．in order that
C．consequently
D．eventually

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The police accused him______fire to the apartment，but he denied having been in the neighborhood on the night of the fire.（）

A．to set
B．setting
C．to setting
D．of setting

单项选择题

If the measures had been available，the doctors and patients ______from SARS.（）

A．could not have died
B．should not have died
C．wouldn’t have died
D．would not die