Though ______, many laws of nature exist.
There have been cases some English learners can’t get their message across even though they have memorized a lot of words.
The chief editor demanded that the article immediately.
The phone rang and I it .
— Ugh, what a mess! You need to clean the room right now, lazy bones!— But the exam is approaching!
Tom is good at his work, but he seems to _____ confidence.