The professor got a disease in blood for the _______ of fresh vegetables and fruit.
| A．snake | B．lack | C．ignorance | D．minority |
__________ life is full of ups and downs, where there is life, there's hope.
| A．When | B．Although |
| C．Since | D．Unless |
__________ time is pressing, we senior three students should work extra hard and stick it out to the end.
| A．If | B．As |
| C．Although | D．Unless |
Children in that kindergarten are sometimes asked to sit on their hands __________ listening to the teacher.
| A．while | B．though |
| C．after | D．during |
-What about the result of your final examination?
-Not so bad. Not so good as my parents expected，__________.
| A．either | B．instead |
| C．though | D．too |
__________ the Internet is of great help, I don't think it's a good idea to spend too much time on it.
| A．If | B．While |
| C．Because | D．As |