The price ________, but I doubt whether it will remain so.
A．went downB．will go downC．has gone downD．was going down
C
考查時態(tài)。句意價格已經(jīng)下降了，但是我懷疑它是否會保持下去。價格下降是過去的動作持續(xù)到現(xiàn)在，故用現(xiàn)在完成時態(tài)。選C。
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