求证:
-- Tomorrow I'm going on holiday.
-- _________! But I'll be busy.
下列各句中,没有语病的一句是 ( )
70+80____70+60 5800–800____6000–3000 130+70____200+20
700–90____700–80 1200–200____1000+200 500–50____400+50
100+50____200–60 100–60____100-70