It ______ we know the result of the experiment.
| A．will not be, before | B．is, since |
| C．will not be, until | D．has been, after |
-- Would you mind carrying the box for me?-- _______
| A．That’s right. |
| B．What a pity! |
| C．Not at all. |
| D．Thank you. |
This is the book _______ I have read these years.
| A．who | B．when |
| C．where | D．that |
Her life ________ a lot during the last three years.
| A．changed | B．changing |
| C．has changed | D．will change |
Hold on to your dreams, _______ they will come true one day.
| A．but | B．and |
| C．so | D．or |
Tom realized that he ________ his physics book at home when he reached school.
| A．left | B．had left |
| C．was leaving | D．leaves |