The conference has been held to discuss the effect of tourism(旅游业) ___ the wildlife in the area.
---Linda, how is your physics project _______?---Very well. I’ll finish it tomorrow.
I hope _______more robots to help people in the future.
---If there are _____people driving, there will be ______air pollution.---Yes, the air will be fresher and cleaner.
I didn’t believe he could drive ________he told me.
---What’s your favorite fruit?---I like ______ best.