When was China’s first cargo spacecraft, Tianzhou 1 sent into space successfully— April 20.

下列各句中，加点的成语运用恰当的一句是（ ）

______ wants to stay in a hotel has to pay bythemselves.

下列加横线词语解释无误的一项是（ ）

Look up(查阅) the following words in a dictionary , Which word can we find first