--The air pollution is terrible.
--It will be worse_______ we take action to protect the environment.
| A．if | B．unless | C．until | D．when |
It’s seven in the morning. It’s time ___________.
| A．go to school | B．going to school | C．to go to school | D．goes to school |
Betty hasn’t got __________ meat in the fridge.
| A．a | B．some | C．any | D．an |
I _______ like science but I think it is very useful.
| A． not | B．don’t | C．am not | D．no |
–______ is your art Lesson? – It’s at 8:20 today.
| A．When | B．Where | C．What | D．Which |
We have no lessons________ Sunday.
| A． in | B．at | C．on | D．into |