Scientists believe Native Americans arrived by crossing the land bridge that connected Siberia and _________ more than 10 000 years ago.
| A．this is Alaska | B．Alaska is now |
| C．is now Alaska | D．what is now Alaska |
---The thread of my kite broke and it flew away.
---I told you it would easily break _____ was the weakest.
| A．where | B．the place where | C．for it | D．where it |
There comes a time in every man's life_____.
| A．that he needs to think | B．when he has to think |
| C．therefore he has to work hard | D．then he will need it |
We saw a film yesterday afternoon , _____we had supper in a nearby restaurant.
| A．when | B．which | C．before it | D．after which |
I thought I was going to fail the exam, but I succeeded _______.
| A．first all | B．in all | C．at all | D．after all |
---What's the difference between the first house and the second ?
---The first house has a garage while the second has _____.
| A．no one | B．nothing | C．neither | D．none |