Fill in each blank with a given word or expression in their right form.discover pause amazing used to belong to look forward to think of landThe plane willin five minutes.

A、Capitalize the first letter of each sentence
B、Capitalize the first letter of the name of holidays
C、Use elliptical sentences
D、Choose beautiful greeting card.

A、线性环节
B、滞后环节
C、非线性环节
D、微分环节