Social attention should be paid our earth from .
| A． to prevent; being polluted | B． to preventing; polluted |
| C． to prevent; polluting | D． to preventing; being polluted |
After his journey abroad, Richard Jones returned home, ___.
| A．excited | B．exciting |
| C．being excited | D．having excited |
I like __________in the early morning when the air is fresh and I can take a walk around the garden.
| A．that | B．it | C．which | D．what |
He is a successful businessman and he ___ his success more to luck than to ability.
| A．attaches | B．adapts |
| C．owes | D．fastens |
__________is no possibility __________Bob can win the first prize in the match.
| A．There；that | B．It；that |
| C．There；whether | D．It；whether |
The police recommended parents __________their children under 12 to ride to school for safety.
| A．not allow | B．do not allow |
| C．mustn’t allow | D．couldn’t allow |