I don’t know _______. Can you help me? —I thinkyou should calm down and read texts.

Parents should encourage teenagers to do social work for their________ /k’mju:nt/.

Do you think it true that all the theories should ________ facts?-I don’t suppose so. If so, there would be no predictions(预言) [ ]

There used to ________ a clean river inthe village, but now it’s dirty.

Mo Yan won the Nobel Prize for Literature last year. ________ excellent he is!