下列句子中加横线词语运用不正确的一项是（ ）

在下列实数$\frac{1}{4}$，$\sqrt{5}$，-$\sqrt{7}$，3.14，π．其中有理数出现的频率为（　　）

句型转换

（1）Her father can play basketball and table tennis. (改为否定句)

Her father ____  ____ basketball ____ table tennis.

（2）Lucy can dance well. Can you dance well? (改为同义句)

Lucy can dance well. ____  ____you?

（3） Don't be worried about me. (改为同义句)

Don't ____  ____ me.

（4）Mike can play basketball well. (改为一般疑问句并作肯定回答)

—____ Mike ____ basketball well?

—____, he____.

（5）I want to join the Dance Club. (改为同义句)

I ____  ____  ____ join the Dance Club.