Since the time humankind started gardening, we _____to make our environment more beautiful.
A. try B. have been trying
C. are tryingD. will try
There is no greater pleasure than lying on my back in the middle of the grassland, _____at the night sky.
A. to stareB. staringC. staredD, having stared
You will never gain success________ you are fully devoted to your work.
A. whenB. becauseC. afterD. unless
— I’ve prepared all kinds of food for the picnic.
—Do you mean we_____ bring anything with us?
A. can’t B. mustn’tC. shan’t D. needn't
As John Lennon once said，life is_____ happens to you while you are busy making other plans.
A. whichB. that C. whatD. where
____your own needs and styles of communication is as important as learning to convey your affection and emotions.
A. UnderstandingB. To be understood
C. Being understoodD. Having understood
