The heavy snow lasted for a week, _____ a serious traffic confusion in the whole area.[ ]

Writing out all the invitations by hand was more time-consuming than we______.

(2013·福建三明二模)—Look at the full moon. How beautiful it is!—How I wish I ________ on it some day!

The teacher was happy with the girl because she made ___________ progress.

It took us several hours to make the old man_____ of the safety of travelling by air.[ ]