Time goes by so fast . We must never miss the chance to show love for our parents and make them _____ how much they mean to us .
--What do you think of the 3-D printer?--It’s great although it still needs further ______.
_______valuable information you’ve offered us! Thanks so much!
This is ______ unusual course that is taught in ______ university, but it’s of no use to the real life.
I was just beginning to wonder _________.
— How many of you are going to the party?—________, they are all going to the concert.