－I’ll come and see you next Wednesday.(丰台区)－Is that a_______? Don’t disappoint me, I hope.

Although we had told them not to keep us waiting, they made no _________ to speed up deliveries.

Seeing the happy ______ of children playing in the park, I’m full of joy and confidence in the future of our travel agency.

His latest research is at the   of genetic science. 

It is widely reported in the western media that the drug ______ is now becoming a leading cause of teenager crimes.