The wind, together with rain and fog, _____ making sailing difficult. A. have been B. was C. / D/ are
Hong Zhanhui never gives up trying. It is the love and responsibility _______ has driven him to go through hardships and survive in life.
Several witnesses gave accounts of what they had seen. It took many hours to _______ the court of the driver's guilt.
We invited her to join us in the discussion, but she would not _______.
The tomato is the world's most popular fruit. _______ the pumpkin, botanically speaking it is a fruit, not a vegetable.
—How unhappy your roommate looks!—Yes, but he's not willing to tell me what it is _______ is troubling him.