單項(xiàng)選擇題Construction of the railways helped to develop the national （） of Tanzania and Zambia.
A.economic
B.economies
C.economics
D.economical
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1.單項(xiàng)選擇題Take it（）It is nothing but a joke.
A.easy
B.easily
C.serious
D.seriously
2.單項(xiàng)選擇題I'm（）to graduate in the next half of the year.
A.owing
B.thanks
C.due
D.because
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I was（）than angry when I saw how they'd ruined the landscape.
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Inquiries（）the condition of the patients may be made personally or by telephone.
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