_____ he was tired , ____ he didn’t stop working .
| A．Though; / | B．Although ; but |
| C．But ; / | D．But ; although |
There are ______________ birds there in the sky.
| A．Million of | B．five millions of | C．millions of | D．five millions |
I think teenagers ____________ to choose their own clothes.
| A．be allowing | B．should be allowed | C．be allowed | D．should allowed |
---Lucy _________ really quiet but now she is very outgoing.
---Yes. She has changed a lot.
| A．use to be | B．used to | C．used to be | D．be used to be |
---How do you learn English?
--- I learn English__________ making flashcards..
| A．on | B．for | C．by | D． with |
---What would you do if _________ eighty-year-old man fell down in front of you?
----I don’t know. Maybe I will help him.
| A．a | B．an | C．the | D．/ |