Do you know whether scientists have ________a good way to deal with Influenza H7N9 or not?—Not yet .But they’re trying their best.

Is there ________________ about the event of the missing Malaysia Airlines plane(马来西亚飞机失踪事件)in today’s newspaper?

How long ___ to finish the work ?

Harry Potter first ________ in 2001 and attracted a large number of people.

We tried our best to ______, but she didn’t stop crying.