______ scientists know where a storm will happen, winds will suddenly change, carrying the storm to a new direction.
| A．Even if | B．Since | C．Despite | D．Unless |
He, along with his sister, ______ how serious the situation is.
| A．haven’t realized | B．hasn’t realized |
| C．don’t realize | D．didn’t realize |
—These things are not useful to anyone, are they?
—______. We can throw them away.
| A．Yes, they are | B．Yes, they aren’t |
| C．No, they aren’t | D．No, they are |
—My sister took a photo with Jay Chou last year.
—______.
| A．So had I | B．So I had | C．So did I | D．So I did |
Our English teacher suggested we ________ English as much as possible in class.
| A．must speak | B．may speak | C．spoke | D．should speak |
Remember to introduce your friend Stone to me when he arrives, ______?
| A．will you | B．won’t you | C．will he | D．doesn’t he |