A.1
B.2
C.3
D.4

A.Cu.
B.Ag.
C.Fe.
D.

A.Cu.
B.Ag.
C.Al.
D.Au.

A.coffee
B.beer
C.tea
D.wine

A.\(P = a{b^2}\)
B.\(P = {a^2}{b^2}\)
C.\(P = {a^2}b\)
D.\(P = ab\)

A.\(M\left( { - 1;0} \right)\)
B.\(M\left( {0; - 1} \right)\)
C.\(M\left( {0;1} \right)\)
D.\(M\left( {1;0} \right)\)

A.As long as you are in my situation, you will understand my feeling.
B.If only you were in my situation and you understand my feeling.
C.I wish you were in my situation and could understand my feeling.
D.You are not in my situation. Otherwise, you could have understood my feeling.

A.Were we not terribly poor, my parents wouldn’t have always managed to send money every year to an orphans’ home.
B.Such was our terrible poverty that my parents always managed to send money every year to an orphans’ home.
C.Terribly poor though we were, my parents always managed to send money every year to an orphans’ home.
D.But for our terrible poverty, my parents would have always managed to send money every year to an orphans’ home.

A.Were we not terribly poor, my parents wouldn’t have always managed to send money every year to an orphans’ home.
B.Such was our terrible poverty that my parents always managed to send money every year to an orphans’ home.
C.Terribly poor though we were, my parents always managed to send money every year to an orphans’ home.
D.But for our terrible poverty, my parents would have always managed to send money every year to an orphans’ home.

A.You should have left a little food on your plate.
B.You must have left a little food on your plate.
C.You can’t have left a little food on your plate.
D.You needn’t have left a little food on your plate.