A small car is big enough for a family of three ______you need more space for baggage.A．once B．in case C．if D．unless D【解析】试题分析：考查连词：

So far, the disease has not been _____ terrible as it seems to be

call you ______ I arrive in Shenzhen—Thanks, and good luck

nows if _______ that boy, but if_______ him, her parents will be disappointed

man had expected to see all his children when in hospital, but _____ came tosee him.