When I am about to go ______a plane to go______,I often think about this.
Today Bob contradicted Ms. Li, our math teacher, in class, _____ made her angry with him.
Many things that were once considered useful and _____, for example, tobacco, is now thought harmful.
Since time is limited, let’s cut _____ the unimportant details.
—Mum, I’m going to take my driving test tomorrow.—_____ I’m sure you will pass it.
It’s necessary for you to _____ at least an hour each day to learn the new vocabulary.