---The air pollution is terrible.
---It will be worse _______ we take action to protect the environment.
| A． if | B．unless |
| C．until | D．When |
We spend as much time as we can _______ English.
| A．read | B．to read | C．reading | D．have read |
When did your father _______ your mother?
| A．marry | B．marry to | C．marry with | D．get married |
---Have you returned the book to the library _______?
---Yes, I have _______ retuned it.
| A．yet, yet | B．already, already | C．already, yet | D．yet, already |
---Do your parents have the same hobby?
---No．My father likes playing____ football while my mother enjoys playing _____piano．
| A．／；the | B．／；／ | C．the；／ | D．the；the |
My parents are always strict________ me.
| A．with | B．in | C．on | D．for |