.
We won’t give up _____ we should fail ten times.
| A．even if | B．since | C．whether | D．until |
A week-long raining is coming, _________, the farmers say, will do harm to the growth of plants.
| A．it | B．that | C．what | D．which |
---I don’t like the guest that is coming to visit this evening.
---_________ you feel about him, try to be polite.
| A．How | B．What | C．Whatever | D．However |
______he came to this small town, he began to like it.
| A．For the first time | B．By the first time | C．At the first time | D．The first time |
--- Why are you so late?
--- I was in half the way when it ________to me that I had left my notebook home, so I had to fetch it.
| A．occurred | B．hit | C．happened | D．reminded |
There______ a number of natural mysteries in the world that even make scientists ______.
| A．exists; confusing | B．are existed; confused |
| C．exist; confused | D．exist; confusing |