If you want to make progress, you’d better be strict _____ yourself ______your studies.

It was ________ the trouble to explain a job fully to new employees.

I am ________ with Mr Wang's ___________ talking ; I can't wait any longer for its end.

I’m very ________ about expressing my opinions in public in case I may make mistakes.

Not all parts of the interior (腹地) of Australia are easily _____, because it is very hot and not many people live there.