The accident happened ________ a cold winter morning.
| A．in | B．at | C．of | D．on |
He is__________as a leader but he hasn’t__________in teaching.
| A．success; many experiences | B．a success; much experience |
| C．great success; an experience | D．a great success; any experiences |
Only by practising constantly__________ greater progress.
| A．we can make | B．then we will make |
| C．can we make | D．we must make |
__________ printed, this science fiction will be popular among the students.
| A．Before | B．Unless | C．Although | D．Once |
. —I’m leaving for Canada on a study trip next week.
—_________.
| A．Enjoy your time | B．That’s all right |
| C．You’re welcome | D．It’s a pleasure |
—I think honesty is the most important thing in doing everything.
—_________.
| A．All right | B．Never mind | C．I think so, too | D．Yes, please |