221. There are 5 ________ in the passage about nanometer(纳米) technology we have just read. Please tell me the general meaning of the first one.
| A．persons | B．paragraphs | C．articles | D．Units |
The media can often help solve problems and _____ attention to situations ______ help is needed.
| A．take; which | B．draw; where | C．pay; that | D．draw; / |
The discovery of the new evidence led to ______.
| A．the thief having caught | B．catch the thief |
| C．the thief being caught | D．the thief to be caught |
In the 19th century the government _____ land to settlers willing to take care of it.
| A．advocated | B．separated | C．divided | D．distributed |
It ______ quite correct that happiness comes from thinking about things in a positive way.
| A．has turned out | B．has been turned out | C．is turning out | D．is turned out |
— Did you know any Chinese, Joyce, before you arrived in Beijing?
— In fact, never _______ it.
| A．have I learned | B．I have learned | C．had I learned | D．I had learned |