About ____ gene-targeting drugs are already in testing pipeline. It won’t be long ____ they are put into effect.
#14064
A
two dozen; before
B
two dozens; that
C
two dozens of; before
D
dozens; that
推荐题目
theirs  
#13381
A
thread
B
smooth
C
thirsty
D
health
 I went to her home and found her living conditions were_______ than mine.
#12409
A
bad off
B
badly off
C
worse off
D
bader off