Please make sure the light will _____ if no one is in the room.
| A．turn off | B．put out | C．take away | D．go out |
More wild tigers have been seen in the forest around this area, ________ there used to be very few.
| A．when | B．where | C．what | D．which |
It is usually warm in my hometown in March, but it ________ be rather cold sometimes.
| A．must | B．can | C．should | D．would |
You can never be ________ when crossing the street.
| A．very careful | B．too careful | C．carefully enough | D．enough careful |
________, you need to give all you have and try your best.
| A．Being a winner | B．To be a winner | C．Be a winner | D．Having been a winner |
Before Sally left home, her mother kept telling her to ________ her manners at the party.
| A．notice | B．care | C．mind | D．observe |