方程的根是（ ）．
A：
B：，
C：，
D：，
1.What are your best ____(祝愿)?
2.Their ____ (工作) are standing and watching at the door.
3.My friends are coming ____(不久).
4.He____ (听) to the teachers carefully in class.
5.My friend ____(写信) to me three times a month.
的根是（ ）．