It is fashionable to drive a car, but to drive a car is not nearly as difficult as it is imagined on condition that you ________ the specialized rules.
With the successful launch of Tiangong-I, which was ______ breakthrough in space field, China's space dream took a step closer to ______ reality.
---Jenny, I think I’ll just have some coffee for a change. ---______.The coffee I bought yesterday is in the cupboard.
Now that we’ve discussed our problem, are people happy with the decisions _________?
Everybody was touched _________ words after they heard her moving story.
One of the most important questions they had to consider was _________ of public health.