Parents ____ bring up their children under 16 and educate them properly.
| A．could | B．may | C．might | D．ought to |
— Happy birthday!
—Thank you! It's the best present I __________ for.
| A．should have wished | B．must have wished |
| C．may have wished | D．could have wished |
Most American children go to state schools, but the private schools __________ be very good.
| A．must | B．can |
| C．should | D．ought to |
Since nobody gave him any help, he __________ have done the research on his own.
| A．can | B．must |
| C．would | D．need |
—Why are your eyes so red? You __________ have slept well last night.
—Yeah, I stayed up late writing a report.
| A．can't | B．mustn't |
| C．needn't | D．won't |
I am going to Europe on vacation together with John if I __________ find the money.
| A．can | B．might |
| C．would | D．need |