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 |
She often does things _____ she enjoys. So she has a happy life.
| A．what | B．where | C．who | D．that |
_____ he tried his best, he failed at last.
| A．Yet | B．But | C．Though | D．However |
Mark is telling his parents _____ he saw on the way home just now.
| A．which | B．where | C．what | D．Why |
She has some trouble _____ out the math problem.
| A．work | B．to work | C．working | D．Works |
You have to adapt_____ the new environment when you go to a new place.
| A．with | B．to | C．for | D．On |