When it ______ research into heart disease and its effects on the body, we do not have adequate substitutes for the use of animals.
#71865
A
refers to
B
related to
C
comes to
D
talks to
推荐题目
We had to ______ our visit to the Bird Nest because we didn’t have enough time to see them before we left Beijing.
#73981
A
prohibit
B
postpone
C
promote
D
deposit
At present, computer knowledge has become ___________ requirement as the ability to read and write.
#65550
A
so basic a
B
so a basic
C
as basic a
D
as a basic
In our hometown, about 1,500 meters east of my house,_______ an old temple_______ back to the 17th century．
#71272
A
stands; dating
B
is standing; dated
C
standing; dated
D
stand; dating
The English language ____ the grammar and vocabulary that people from many different countries and cultures brought to Britain.
#70911
A
is made of
B
is consisted of
C
is made up of
D
makes up