12_________ 5 makes 7 [ ]

Isn’t that Ann’s husband over there ?— No, it _______ be him— I’m sure he doesn’t wear glasses.

It is very kind you to help me with my lessons. It’s hard me to learn them well without your help.

ing special about this device—Well, it can ________ between the cancerous and the normal cells under certain conditions.

Where do you live— In Beijing. It is one of in China.