You are sure to fail the exam you study hard.
| A．if | B．unless | C． since | D．that |
–Look at that girl! Is it Susan?
--No, it _______ be her. She has gone back to her hometown.
| A．mustn’t | B．can’t | C．needn’t | D．wouldn’t |
–Would you mind my using your dictionary? --__________.
| A．Yes, please | B．Of course not | C．You are welcome | D．My pleasure |
–Thanks for your help. --_________.
| A．No, thanks | B．Let me see | C．It doesn’t matter | D．That’s OK |
–Where are you going for your holiday?
--Well, we _______ yet.
| A．haven’t decided | B．hadn’t decided | C．don’t decide | D．didn’t decide |
--When _______ you _______ to learn to skate?--Five years ago.
| A．do , begin | B．will , begin | C．have , begun | D．did , begin |