Although you may meet some difficuIties,you should never .
I have two pens. ______ is red, ______ is black.
We like elephants , because they are interesting . And we like dogs , ______.
One of the students _______China.
_______ is easy for many students to _______ to school.A. It , get B this, arrive C. That, get D. He, arrive
—Must I get there on time?一No, you . A. can't B. mustn't C. needn't