A. is getting along well B. are getting along well C. is got along wel D. are got along well
A. to make B. to have made C. made D. having made
A. had participated B. participant C. participating D. participate
A. charge B. charges C. charging D. is charging
A. 提高價格一定能增加收益 B. 降低價格一定會減少收益 C. 提高價格未必能增加收益,降低價格術必會減少收益 D. 以上都不對