So difficult _____ it to adjust to an English-speaking environment that he determined to learn English hard.
| A．he has felt | B．has he felt | C．he did feel | D．did he feel |
A completely new situation is likely to _____ when the school leaving age is raised to 16.
| A．arouse | B．rise | C．arise | D．abide |
. I must go now. _____, if you want that book I'll bring it next time.
| A．Incidentally | B．Accidentally |
| C．Occasionally | D．Subsequently |
Achieving a high degree of proficiency in English as a foreign language is not a mysterious _____ without scientific basis.
| A．process | B．practice | C．procedure | D．program |
They were so far away that I couldn't _____ their faces clearly.
| A．see through | B．make up | C．see off | D．make out |
If the boy had _____ the dog alone it wouldn't have bitten him.
| A．set | B．left | C．had | D．put |