单项选择题
The man will have to wait all day（）the doctor works faster．
A.ifB.unlessC.whereD.that
单项选择题 Mr．Black went back （）place （）he was born．
单项选择题 Mick’s new DVD player is only about 20 cm （）15 cm and weighs（）2 kilos．
单项选择题 The professor has received the letter（）to give a lecture in ftinceton Institute.
