The nutrients in _____falls into the ocean quickly become available to other living creatures.[来
| A．whatever | B．whichever | C．that | D．wherever |
Even though the Smiths have moved to a faraway place, we still see them ___.
| A．from time to time | B．at a time |
| C．at the same time | D．all the time |
He was ______ to find that it was almost impossible to undertake the task.
| A．cast off | B．cast out | C．cast away | D．cast down |
I took a risk to carry out the project, but it ____ in the end.
| A．paid up | B．paid out | C．paid off | D．paid back |
The boys marked ____ a football court on the playground.
| A．out | B．up | C．down | D．with |
Thoughts can also be expressed _____ music.
| A．though means of | B．by way of |
| C．with the method of | D．by means of |