The party will be held in the garden,weather___
| A．permitting |
| B．to permit |
| C．permitted |
| D．permit |
That is the man ____ house the police found the lost computer last week.
| A．in whose | B．in what | C．in that | D．in which |
He found that complex problems, especially those _____ abstract thinking, were best for picking out bright and dull students.
| A．involve | B．involved | C．involving | D．being involved |
. Don’t promise anything _____ you are one hundred percent sure.
| A．if | B．after | C．in case | D．unless |
You _____ tell him. He is fully aware of the danger.
| A．mustn’t | B．don’t need | C．needn’t | D．can’t |
_____ his ability of speech, he has made use of each chance.
| A．To improve | B．Improving | C．Being improved | D．Improved |