—Why didn’t Sam attend the party yesterday evening?
—He ___ not have wanted to see me.
| A．should | B．might | C．could | D．would |
She was so angry that she rushed out into the rain ______ I could stop her.
| A．when | B．until | C．before | D．after |
While listening to the concert, the audience is required to remain ______ and keep quiet.
| A．seated | B．to be seated | C．seating | D．to seat |
It is important to know about the cultural differences that______ cause problems．
| A．must | B．may | C．dare | D．shall |
In classes, you’d better understand as much as possible while ______ notes.
| A．take | B．taken | C．taking | D．to take |
Thank you for all your hard work last week. I don’t think we ______ it without you.
| A．could have managed | B．can manage |
| C．could manage | D．can have managed |