David may wonder ______ yellow was the colour of rulers in ancient China.
| A．that | B．whether | C．if that | D．where |
They are not _______ pants. _______ are under the bed.
| A．our; Ours | B．your; Your |
| C．theirs; Their | D．her; She |
Tom doesn’t like red pens, so he wants a blue _______.
| A．it | B．that | C．ones | D．one |
You should ________ the flowers once a week.
| A．to water | B．water | C．watered | D．waters |
Mr and Mrs White _______ happy today.
| A．aren’t | B．don’t | C．isn’t | D．doesn’t |
— _______ is the hospital? — About twenty minutes’ walk.
| A．How fast | B．How often |
| C．How far | D．How long |