He has accepted the job because he likes challenge, and the chance of dealing with difficult problems ____ to him.

Hearing the dog barking fiercely, away__________.[ ]

3D printers are still _____ expensive for most of us ______ afford.

rst snow of every year is always soexciting, but too much snow _________ cause trouble

Whoever leaves the room last must make sure________all the windows are shut.[ ]