We should tell hunters _______tigers.
| A．don’t kill | B．not kill | C．killing | D．not to kill |
While Mary ___ a letter, the children were playing outside.
| A．wrote | B．writes | C．is writing | D．was writing |
---________
--- K-E-Y, key.
| A．What’s this? | B．Spell “key”,please. |
| C．What color is the key? | D．This is a key. |
He never____learning English.That was why he was successful at last.
| A．gave in | B．gave out | C．gave up | D．gave away |
I found ______ not very difficult to keep away from the A/H1N1 Flu.
| A． that | B．this | C．one | D．it |
— Oh, this cartoon book is very interesting. Where did you buy ____? I want to buy _____, too.
— In the bookshop near my home.
| A．one; one | B．it; it | C．it; one | D．one; it |