We work together to achieve our common purpose: ________ world that is safer, cleaner and healthier than ________ one we are living in.
| A．the ; / | B．a ; / |
| C．the ; the | D．a ; the |
My brother is _____ his homework. He often _____ his homework at home.
| A．does； doing | B．doing； do |
| C．do； doing | D．doing； does |
—Here is a schoolbag. Whose is it? —Oh, it’s _______ Thank you.
| A．my | B．mine | C．me | D．I |
—_______ is this pen？ —It’s mine.
| A．What | B．Whose |
| C．Where | D．How |
This is ______ key and that is ______ eraser.
| A． a; a | B． a; an |
| C．an; a | D．an; an |
There’s ______ water in the cup.
| A．lot of | B．a lot of |
| C．many | D．a lot |