选B.因为about是介词,接代词宾语时要说 think about it
over是副词,接代词宾语时要说 think it over
动介词组的特点是:宾语一律放在词组后面.
动副词组的特点是:宾语是名词时,宾语放词组中间或词组后均可.如 put on your coat = put your coat on 当宾语是代词时,宾语只能放词组中间.如 put it on
选B.因为about是介词,接代词宾语时要说 think about it
over是副词,接代词宾语时要说 think it over
动介词组的特点是:宾语一律放在词组后面.
动副词组的特点是:宾语是名词时,宾语放词组中间或词组后均可.如 put on your coat = put your coat on 当宾语是代词时,宾语只能放词组中间.如 put it on