_____everybody is here, Let’s set off.
| A．Since | B．Because | C．For | D．After |
I would like to do it_____I like it.
| A．since | B．because | C．because of | D．now that |
If you_____this experiment you will understand the theory better.
| A．will be doing | B．have done | C．will have done | D．would do |
I don’t like to be interrupted if I_____.
| A．speak | B．will speak | C．am speaking | D．spoke |
I wonder if he_____us, and I think if he_____us we’ll be able to complete the task ahead of time.
| A．helps, helps | B．will help, helps |
| C．helps, will help | D．will help, will help |