As is often pointed out, knowledge is a two-edged weapon which can be used ________ for good or evil．
| A．similarly | B．properly | C．equally | D．widely |
At the meeting, the old man ______ some good advice about bringing down the market price of onion.
| A．came about | B．came along | C．came up with | D．came out |
We were swimming in the lake _____ suddenly the storm started.
| A．when | B．while | C．until | D．before |
Alice didn’t want her parents to know.
| A．what has she done | B．what was she doing |
| C．how she had done | D．what she was doing |
It tookbuilding supplies to construct these energy-saving houses. It took brains, too.
| A．other than | B．more than | C．rather than | D．less than |
Every evening after dinner, if notfrom work, I will spend some time walking my dog.
| A．being tired | B．tiring | C．tired | D．to be tired |