While John was walking to school, he heard a bird ________ in a tree.

[　　]

A．to sing　　　　B．singing　　　　C．sing

I followed it to see________.

[　　]

A．where it was going

B．where was it going

C．what was it going

What ________ you doing at 9 o'clock last Sunday morning?

[　　]

A．are　　　　B．was　　　　C．were

The girl ________ shopping when the alien got out.

[　　]

A．is　　　　B．was　　　　C．were

My mother was ill________.

[　　]

A．in the hospital　　　B．in hospital　　　C．in a hospital

I jump ________ high ________ Li Lei.

[　　]

A．as; as　　　　B．so; as　　　　C．so; so

I'm late, so my teacher is angry ________ me.

[　　]

A．to　　　　B．for　　　　C．with

The boy is ________ to go to school.

[　　]

A．enough old　　　B．enough young　　　C．old enough

I want to know ________.

[　　]

A．where Li Lei lives

B．how old. is Li Lei

C．how is my grandma

Li Lei doesn't know ________ to do it.

[　　]

A．how　　　　B．where　　　　C．what