Lucy has already tried her best. Please don’t be too ______ about her job.

_______ the children grew old, they became more and more _______ in science.

Experts warn that global warming will cause climate changes, including more ______ floods, heat waves and droughts. 

 With April 18’s railway speedup, highway and air transport will have to compete with ______ service for passengers.

We’re going to visit so many ______ places and do lots of _______ things .