______ with care, one tin will last for six weeks.
| A．Use | B．Using | C．Used | D．To use |
In _____ to the physical benefits, aerobic exercise has emotional benefits.
| A．principle | B．outcome | C．turn | D．addition |
As _____ matter of fact, basic gardening is so easy to achieve that even people with physical handicaps can garden.
| A．an | B．the | C．/ | D．a |
They travelled around _____ Changchun by _____ bus.
| A．the, / | B．/ , a | C．/, / | D．the, a |
John rushed out in a hurry, _____ the door _____ .
| A．leaving; unlocked | B．leaving; unlocking |
| C．left; unlocked | D．left; unlocking |
Please come to visit me if _________________.
| A．you are convenient | B．it is convenient of you |
| C．you are for convenience | D．it is convenient for you |