Be careful!Don't walk on the grass，________ it will"cry"．（ ）
A．andB．butC．orD．so
I had a good time in the study trip last week．
________．（ ）
A．With pleasure．
B．Thank you．
C．OK!
D．I'm glad to hear that．
Everyone should stick to his dream．
Yes． A life without a dream is like a bird without ________， which can't fly．（ ）
A．wingsB．waterC．cloudsD．food
The young are always busy checking their mobile phones while getting together．
So it is． They should put down phones and have more talks， ________．（ ）
A．stillB．tooC．eitherD．instead
I'm tired of cleaning the house．
Sweeping robots _____ more and more widely today． Why not buy one？（ ）
A．are usedB．were usedC．are usingD．used
In my opinion， animals shouldn't be kept for fun．
I think so． Forests are the best places for animals ______________．（ ）
A．liveB．livingC．to liveD．to live in