We must keep our room clean , for dirt and disease go , you know .
| A．hand in hand | B．step by step | C．from time to time | D．one after another |
Our club is open to adults only. ______ your children have entered without permission.
| A．There seems to be | B．It seems to be |
| C．There seems that | D．It seems that |
He _____ have gone to Shanghai, for I saw him a moment ago.
| A．must | B．can’t | C．mustn’t | D．can |
Nowhere _______ find the necklace ______ by her husband in celebration of their tenth wedding anniversary.
| A．could she; giving | B．she could; giving |
| C．could she; given | D．she could; given |
We need to put safeguards ______ to prevent this type of accident occurring again.
| A．in mind | B．in trouble | C．in general | D．in place |
Alice kept perfectly still, ______ that the dog might attack her. “It was the most ______ experience of my life,” she told me later.
| A．frightening; frightened | B．frightened; frightening |
| C．frightened; frightened | D．frightening; frightening |