---Is the Youth Center open to the public yet?
---Yes. It ______ for almost one and a half years.
| A．has opened | B．has being opened |
| C．has been open | D．was open |
--Hey, Joe, why not eat out to celebrate Mum’s birthday? She makes meals for us every day.
-- _________
| A．Yes, she will. | B．Good idea. |
| C．Let me have a look. | D．We will go. |
．--_________ will your parents come back to Shanghai?
--Maybe in a month.
| A．How far | B．How many | C．How soon | D．How often |
People _________ rivers for transportation since the beginning of history.
| A．used | B．have used | C．use | D．had used |
The new headmaster looks _________ to all the teachers and students of the school.
| A．friendly | B．seriously | C．probably | D．gently |
If the kids stay indoors all the time and get no exercise, they _________ weak.
| A．become | B．have become | C．will become | D．became |