—I’m still working on my project.—Oh, you’ll miss the deadline. Time is ______.
Mary __________ to know where you have been, as she has something important to tell you.
My father and his teacher talked for about an hour of things and persons ______ they remembered at the school.
They have to explain ______ us the reason _____ their doing so.
Hand in hand with reading, Dave ____ the habit of making notes.
In the past few years, Chinese scientists ________ great success in the field of space flight.