The country has already sent upthree unmanned spacecrafts, the most recent at the end of last March.
[ ]
A.has been launched B.having been launched C.being launched D.to be launched
参考答案:
Recently a survey ________ prices of the same goods in two d..
Recently a survey ________ prices of the same goods in two different supermarkets has caused heateddebate among citizens.[ ]A. comparedB. comparingC. comparesD. being compared