--You look so pale.What trouble you? ----I ___ my dead mother.

A．though about

B．was thinking about

C．have thought about

D．am thinking about

购买债券时支付的价款中包含的已到付息期但尚未领取的短期债券投资利息计入应收利息，实际收到该利息时，借记“银行存款”，贷记“应收利息”，不计入当期损益。