— We very simply and do not spend much money on food.
— That's why you're called the Greens.（ ）
A．eatB．ateC．will eatD．had eaten
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