.It is written clearly in the requirements that all passengers______check onto board thirty minutes before the plane takes off.
—I can't remember those grammar rules!—_________. Practice more.
Take your time—it’s just _____ short distance from here to _____ restaurant.
To prevent driving too long a time,we________ driving on the highway.
He said he was very busy,but ________he had nothing to do.
I don't know what to ________her recent behavior at all.