Don’t talk with your partners in class_______ you are asked to do so.
A. if B. when C. unless
—Whose hair band is this?
—It _____ be Grace’s. She is the only girl at the meeting.
| A．might | B．wouldn’t |
| C．must | D．can’t |
________ the weather report, we will have terrible cold weather this winter. So we should do something to keep warm.
| A．according to | B．thanks to |
| C．because of | D．instead of |
—More and more students wear glasses now.
—______.
| A．So they are | B．So are they |
| C．So they do | D．So do they |
—Jim, do you know the reason _____ Bob kept silent during the discussion?
—I guess he was thinking about his sick dog. It might be dying.
| A．why | B．what | C．where | D．which |
We’ll leave for senior high schools soon. It’s really difficult _______ goodbye to our teachers and friends.
| A．to say | B．to speak |
| C．saying | D．speaking |