As you know, it is my duty to __________ my younger sisters from being hurt when they are in danger.
| A．prevent | B．keep | C．stop | D．protect |
—Have you been working in N0.5 Middle School since you graduated from college?
~No, I _______ in the countryside for 3 years.
| A．have taught | B．had taught |
| C．have been teaching | D．taught |
What some Chinese parents understand is that nothing is fun _______ their children are fond of it.
| A．after | B．when | C．if | D．unless |
The owner of the jewelry store says a(n) _______ of $ 1,000 will be offered to anyone who can find the lost jewels.
| A．income | B．reward | C．bonus | D．fee |
— Can I come to ask for some advice at any time?
—Yes, of course. ___________ .
| A．If you're convenient | B．At your convenience |
| C．Don't worry | D．Don't mention it |
The stronger the _____is, the more quickly a man will learn a new skill. In other words, it is up to whether he has an interest in it.
| A．ambition | B．inspiration | C．aspiration | D．motivation |