_________ I felt somewhat disappointed and was about to leave，something occurred which attracted my attention.
| A．Unless | B．Until | C．When | D．While |
If you _____ the meeting place in greater detail, I _____ so much time looking for it.
| A．described; wouldn’t waste | B．had described; wouldn’t have wasted |
| C．would have described; had wasted | D．described; wasted |
He turns a deaf ear to his parents, _____ many times they have pointed out his weakness.
| A．whatever | B．whichever | C．whenever | D．however |
. Mage is rather difficult to make friends with, but her friendship, _____ is truer than any other.
| A．once gained | B．when to gain | C．after gained | D．while gaining |
Only through experiences of trial and suffering _____, and success achieved.
| A．the soul can be strengthened | B．can the soul be strengthened |
| C．strengthened the soul can be | D．can the soul strengthened |
Unless _____, the Minister wouldn't attend the welcome party.
| A．to invite | B．inviting | C．being invited | D．invited |