A serious study of physics is impossible _____ some knowledge of mathematics .

By the time Jeremy Lin joined CBA this November, he ______ in NBA for nine years.

______ the chairman of the council, the vice chairman does duty for him

some famous scientists havethe qualities of being both careful and careless

How do youfind James Cameron’s 3D version of Titanic—Fantastic! Itcan’t be _______ and has brought us a wonderful experience.