Text B is perhaps written by_____ A: a new student B: a new teacher C: a foreign reporter D: a foreign visitor

Choose the best answer from the four choices marked A, B, C, and D. The text is perhaps written by ___. A: a new student B: a new teacher C: a foreign reporter D: a foreign visitor

中国大学MOOC:"Directions: Fill in the blank in the following sentence with an exact word from the text.Perhaps the best argument in favor of the humanitites is the _____ of possibilities that are widely open to us. ";

An untidy desk is perhaps a sign ______.

One or perhaps more pages _______.

Perhaps it will be a long time _______ from abroad.

函数$f(x)=x+\sin x$的( )。 A: 上凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$ B: 上凸区间为$((2n-1)\text{ }\!\!\pi\!\!\text{ },2n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(2n\text{ }\!\!\pi\!\!\text{ },(2n+1)\text{ }\!\!\pi\!\!\text{ })$ C: 上凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$ D: 上凸区间为$((n-1)\text{ }\!\!\pi\!\!\text{ },n\text{ }\!\!\pi\!\!\text{ })$,下凸区间为$(n\text{ }\!\!\pi\!\!\text{ },(n+1)\text{ }\!\!\pi\!\!\text{ })$

There are _____ texts. They are Text A _________________, Text B _________________, Text C _________________, Text D _________________.

1. Such a mistake would perhaps lead to terrible ________.

The message is perhaps too _______ to be understood by young children.