— Be quiet, the head teacher Mr. Gu is coming. — Don't worry. It _____ be him. Mr. Gu is much fatter.
A:mustn't
B:may not
C:needn't
D:can't
加偏旁变新字,再组词。
候---____ ____ 列---____ ____ 垂---____ ____
甚---____ ____ 夭---____ ____ 备---____ ____
世界上最大的发展中国家是( )
—Yes, it is. So ________ students can work it out.