—What’s your favourite thing ______? ( )
—Go swimming.

A．to do

B．do

C．does

用所给单词的适当形式填空。
1. Yesterday we _________ (pick) many apples on the farm.
2. His teacher asked him to ______ (study) English hard.
3. He ________ (be) here just now.
4. They ______(leave) in a minute.
5. Mary’s father _____ (bring) a present on her next birthday.

I like______ my mother. (  )

A．help

B．to help

C．helps

It's time ___ watch the football match. (   )

A．to

B．for

C．in

All the students _______ happy _______ see each other.  （   ）

A．are, ／

B．is, to

C．are, to