My brother is a humorous young man,He often tells jokes to make us ( )
laughing
laugh
to laugh
If we _____ take environmental problems seriously,the earth _______ worse and worse.( )
A.don't; won't beB.won't; isn't
C.won't; isD.don't; will be
Which of the following signs means that you can go out here?( )
A.B.
C.D.
We talked about _____ new words.( )
A.learnB.learnedC.learningD.to learn
﹣I left my pen at home.Can you lend me one?( )
A.Yes,of courseB.Thank you
C.Yes,just a littleD.Hold on,please
It old the teacher _____ I had seen.( )
A.whatB.whichC.whereD.that