题干

According to  WHO, health care plans are needed in all big cities to prevent     _________spread of AIDS. 
A.the ; theB.the ;不填C.a ; aD.不填; the
上一题 下一题 0.64难度 单项选择 更新时间:2013-05-26 12:48:23

答案(点此获取答案解析)