Old______he is, he still studies English every day.A．asB．althoughC．ifD．like

While studying at U.C.L.A.,Mr.Wang _______ his old friend, whom he has notseen for ne

Although he has become rich, he is still very ______ of his money.[2001]A．economicB．thrift

______it is long after dark, he is still wearing black sunglasses.A．IfB．AlthoughC．UnlessD．

______, the professor is still trying to learn a new language.A．However he is oldB．Old as

The words of his old teacher left a ________ impression on his mind. He is still in

______ he is still working on the project I don mind when he will finish it.A.In caseB.