Some so-called climate travelers ________ in one place for a few months and then move on to some other places as the weather changes.
| A．have stayed | B．are staying |
| C．stay | D．stayed |
Why the explosion occurred was ____the laboratory attendant had been careless.
| A．for | B．because | C．since | D．that |
They came to the conclusion ________ by a computer.
| A．that not all things can be done | B．because of not all things be done |
| C．being not all things can be done | D．because not all things can be done |
________ is no reason for dismissing her.
| A．Because she was a few minutes late | B．Owing to a few minutes late |
| C．The fact that she was a few minutes late | D．Being a few minutes late |
Mary is ________ someone might recognize her.
| A．afraid of | B．afraid about | C．afraid that | D．afraid for |
I wonder how much ________.
| A．does the watch cost | B．did the watch cost |
| C．the watch costed | D．the watch costs |