T he history proves those islands belong ______ China.
A. to B. at C. on
He_____ the famous film tonight.
| A．was going to see | B．will see |
| C．sees | D．to see |
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 |