Just as a force is required to change the speed of an object,()a force must act to cause a change in the direction of the motion.
A. as
B. thus
C. so
D. like
下列为气血双补之品的药物是
A. 大枣
B. 蜂蜜
C. 廿草
D. 白术
E. 山药
If you were offered a trip to the moon,()it
A. did you accept
B. are you going to accept
C. will you accept
D. would you accept
You've worked long and hard at your job, and it's about time you()able to see some financial re- wards for it.
A. should be
B. were
C. must be
D. are