It's said that ________ gains from house sales should pay the individual income tax.
| A．who | B．whose | C．which | D．whoever |
You can’t imagine that a well –behaved gentleman ______ be so rude to a lady.
| A．might | B．need | C．should | D．would |
— Write to me when you get home.
— __________.
| A．I must | B．I should | C．I will | D．I can |
I was really anxious about you. You _____ __ home without a word.
| A．mustn’t leave | B．shouldn’t have left | C．couldn’t have left | D．needn’t leave |
No bread eaten by man is so sweet as ________ earned by his own labor.
| A．one | B．that | C．such | D．what |
It is written clearly in the requirements that all passengers _______ check onto board thirty minutes before the plane takes off.
| A．may | B．can | C．will | D．shall |