People cannot but feel _____, for they simply cannot understand how he could have made such a stupid mistake.
| A．puzzled | B．delighted | C．induced | D．inspired |
Achieving a high degree of proficiency(精通）in English as a foreign language is not a mysterious _______ without scientific basis.
| A．process | B．practice | C．procedure | D．program |
Generally speaking, if ______ strictly following the instructions, the electric bike is not as dangerous as reported.
| A．riding | B．being ridden | C．to be ridden | D．ridden |
On the National Day, up _____ into the air. Then the crowed cheered.
| A．the balloons went | B．went the balloons |
| C．go the balloons | D．did the balloons go |
The club, _____ 25 years ago, is holding a party for past and present members.
| A．founding | B．founded | C．being found | D．to have found |
We were playing near the lake______ the storm started.
| A．while | B．when | C．until | D．before |