Polar bears live mostly on _____ sea ice, which they use as ___ platform for hunting seals.
| A．a; a | B．a; the | C．不填；a | D．the; 不填 |
—Your brother was brave enough to tell the truth in public.
---Yes, and he will never regret_________ that. I admire him so much.
| A．to do | B．to be doing | C．to have done | D．having done |
Could I have a(n) ______ word with you, Mr. Thomas? It won’t take up too much of your time.
| A．honest | B．straight | C．simple | D．brief |
_____ of danger in the street at night, she had to go home, with a friend ____ her.
| A．Warning, following | B．Having warned, following |
| C．Having been warned, following | D．Warned, followed |
If you keep practising every day, , you’ll find your spoken English improving.
| A．for example | B．on the other hand |
| C．little by little | D．in common |
A certain percent of your salary is ________ by the employer as insurance payments.
| A．kept away | B．kept out | C．kept up | D．kept back |