When it ______ research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
| A．refers to | B．related to | C．comes to | D．talks to |
相关试题
Officials believe that more than one person _____ for the big fire.
| A．is to be blamed | B．should blame |
| C．should be blaming | D．is to blame |
Father ____ , I turned on the computer.
| A．agreed | B．agreeing | C．agrees | D．to agree |
I would appreciate ____ if you can keep an eye on my dog while I am away.
| A．you | B．that | C．不填 | D．it |
The old temple damaged in the earthquake ____ the Qing Dynasty.
| A．is dated back to | B．dates from | C．dated back to | D．was dating from |
t satisfaction, ____ a lot of local villagers.相关知识点
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