._______ his sister, Jack is quiet and does ？

It is through enthusiasm and quiet intensity ______ we transform. creativity and visio

Jack ______ from home for two days now, and I am beginning to worry about his safety.[2003

John is ______ hardworking than his sister, but he failed in the exam.[1998]A．no lessB．no

John is______ hardworking than his sister, but he failed in the exam.（1998年考试真题）A．no

It is ______Jack is modest and thoughtful that he is respected by his colleagues.A．forB．as

His sister left home in 1998, and _______since.A. has not been heard of B. has not bee