He lost his key. It made him ________ in the cold to wait for his wife's return.
A：to stay
B：stayed
C：stays
D：stay
“鹏鹏，该吃饭了！”听见声音，正在做作业的鹏鹏不用抬头看就知道，那是妈妈在喊他，他判断的主要依据是（ ）
下列关于洋流对环境影响的叙述中，正确的说法是（ ）
函数fx=11-x+lg1+x的定义域是( )
