A.Because no economist knows everything
B.Because it always follows a period of prosperity
C.Because there are too many reasons behind it
D.Because it is hard to predict when it will be coming
A.find the exact causes for economic decline
B.find ways to fight unemployment
C.work out all the factors that lead to economic prosperity
D.cooperate with businessmen and politicians
A.agree on the restriction of internal trade
B.disagree whether to restrict free trade or not
C.hold different arguments because of their different interests
D.agree on free trade
A.Ironic
B.Sincere
C.Grateful.
D.Appreciative