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 |
Jane, ________yourself. Have you forgotten the rules I told you？
| A．behave | B．respect | C．consider | D．entertain |
The teacher together with the students ________ discussing “Reading Skills” that ________ newly published in America.
| A．are ; were | B．is ; were | C．are ; was | D．is ; was |
It suddenlyto me that this was something that I should never do, so I turned down her request.
| A．happened | B．hit | C．struck | D．occurred |
We are at your service. Don’t ________ to turn to us if you have any further problems.
| A．beg | B．hesitate | C．desire | D．seek |
He was in poor health, so the doctor _____ him to drink wine.
| A．hoped | B．demanded | C．forbade | D．prevented |