His writing is so confusing that it’s difficult to make out _____it is he is trying to express.
| A．that |
| B．how |
| C．who |
| D．What |
______ it is true that a student's most important goal is to do well in his or her studies, it doesn't need to be the only goal.
| A．When | B．As |
| C．While | D．Before |
With the professor's help, there is no doubt ______ our project is meant for will work out successfully.
| A．that what | B．whether that |
| C．what that | D．that whether |
My father ______ my brother to drive, but my brother wanted to pick ______ the knowledge of the computer during his spare time.
| A．advised; up | B．persuaded; out |
| C．intended; up | D．managed; out |
Before he went abroad, he spent as much time as he ______ English.
| A．could learning | B．learned |
| C．to learn | D．could learn |
Even if you are an experienced teacher, you sometimes ______ make some mistakes.
| A．can | B．must |
| C．should | D．will |