Scientists say it may be five or six years _____ it is possible to test this medicine to human patients.
#92420
A
since
B
after
C
before
D
when
推荐题目
Only _____ as an interpreter _____ how important it was to practise speaking English.
#95187
A
when did I work…I realized
B
when did I work…did I realize
C
when I work…did I realize
D
when I worked…did I realize
Leonardo da Vinci (1452-1519) ____ birds kept in cages in order to have the pleasure of setting them free.
#92910
A
is said to be buying
B
is said to have bought
C
had said to buy
D
has sad to have bought
Information has been put forward ____ more middle school graduates will be admitted into universities.
#94042
A
while
B
that
C
when
D
as