下列哪组字母发音音素相同?A. FH B.GJ C. NX
—Oh!My tooth is aching again!—I think you should have________out in the hospital.
I was supposed to________8:00,but I was late.
Mr Brown________Maria goodbye,and handed her the bag.
The custom________sending birthday cards began in the 19th century.
People in China________when they meet for the first time.