— When do you usually take a walk?—______ the morning.

---Seems no one knows _____ what happened to Malaysia Airline Flight 370.---It’s really sad, hope more and more resources will be offered in the search.

 --- Don’t play with the knife, ______ you’ll cut your hand. ----Sorry, I ______ .

This year’s Beijing Music Awards will be covered          on Channel 3 this evening.

 Please ________ when the train will leave.