The rise of oil prices made scientists search for new energy resources ______ oil．
| A．replace | B．replacing | C．to replace | D．replaced |
To learn English well, we should find opportunities to hear English______ as much as we can.
| A．speak | B．speaking | C．spoken | D．to speak |
So far nobody has claimed the money_______ in the library.
| A．discovered | B．to be discovered | C．discovering | D．having discovered |
—Where did you get to know her?
—It was on the farm______ we worked.
| A．that | B．there | C．which | D．where |
We’ll call on a man ________ I believe can give us very good advice.
| A．which | B．who | C．whom | D．Whomever |
We will do it ourselves ________asking others to help.
| A．instead of | B．instead | C．but | D．however |