There were signs here and there, _____ people to look out for ___rocks.
| A．warned; fallen | B．warning; fallen | C．warning; falling | D．warned; falling |
________ with care, one tin will last for six weeks.
| A．Use | B．Using |
| C．Used | D．To use |
Every day ________ a proverb aloud several times until you have it memorized.
| A．read | B．reading |
| C．to read | D．reads |
All flights ________ owing to the heavy fog, many passengers could do nothing but take trains.
| A．to be cancelled | B．were cancelled |
| C．have been cancelled | D．having been cancelled |
The poem A Red, Red Rose written by Robert Burns is popular with the Chinese young people, because the poem is easy ________.
| A．to be understood | B．to understand |
| C．understand | D．understanding |
Passengers are permitted______ only one piece of hand luggage onto the plane.
| A．to carry | B．carrying |
| C．to be carried | D．being carried |