—Sally, which dress do you like best?
—Oh, I’ve tried several ones on, but _______ of them fit me well.
| A．both | B．either | C．neither | D．none |
Mo Yan’s books have been sold out in many bookstores _________ his winning of the Noble Prize in Literature.
| A．because | B．since | C．as | D．because of |
It makes me very sad whenever I think of my grandma’s______ .
| A．dying | B．died | C．death | D．dead |
The little girl couldn’t be a student because of her __________.
| A．ill | B．sick | C．illness | D．sad |
__________ is really hard _ _ them to climb such a high mountain.
| A．This; to | B．It; to |
| C．This; for | D．It; for |
We must _______ to help them out of trouble.
| A．try our best | B．try your best |
| C．try | D．trying |