I've been considering _______ my job as a teacher because a teacher is often considered _______ a gardener.
Boys and girls, please turn to Page _____ and look at the _____ picture.
Be quick, _____ we’ll be late for school.
— Jane, is this your umbrella? —No, it’s not _____. I didn’t take one this morning.
Three million _______ a large number. You can make it _______.
Over fifty countries _______ the AIIB(亚投行) so far.