People who can’t ___________ between colors are said to be colorblind .

There is _________ that her daughter will pass the examto go abroad to study

(2013·吉林长春三校高三调研)Days later, I tried to get my sister to tell me what was going on, but she ________ say anything.

Everybody should study hard. No one can _______ us _______ a good future.

What does your father do-______________.