My aunt and her son _________ (是) doctors.
我阿姨和她的儿子是医生。我阿姨和她的儿子做主语为名词复数，对应系动词应该用are。故答案为 are。
2018年12月，张阿姨把4000元的存入银行，定期三年，年利率是2.75%到期后，应得利息______元.
Is your father _________ (生气的) now?
Mary, do not _________ (说话) in the library, please.
Tom likes _________ (爬) mountains with his brother.