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 |
If I have any further news, you will be the first person_____.
A.to know | B.known |
C.knowing | D.knew |
The boy student is poor in health now; his parents wish that his health _____when he grows up
A.can improve | B.could improve |
C.can be improved | D.could be improving |
—Which of the two computer games did you prefer?
—Actually I didn’t like .
A.both of them | B.either of them |
C.none of them | D.neither of them |
—I’m going to Thailand this summer holiday.
—
A.Take care! | B.Write to me. |
C.Have a nice trip! | D.When will you come back? |
She always come to our help when we get into trouble ____ she is very busy.
A.since | B.once |
C.even if | D.so that |