Mum， must I take out the rubbish now—No， you _____. You may take a rest first.

I always believe that is difficult if we try our best to do it.

He was afraid of ________ in public.—But now he feels a little more confident.

Mum, you really need to have a rest! You in the kitchen ever since you came back home three hours ago

Three hours later, they got to the top of the mountain, _____.[ ]