Would it be ______ for you to pick me up at four o’clock and take me to the airport ?
Do you know how much time and effort they devoted________ such a complicated project?
When Helen saw his tutor nod ________ to her, she calmed down and went on with her performance.
Never before________ seen a girl who can swim as fast as Ye Shiwen.
English is difficult________. Nobody can learn to use it in a few minutes.
The fact that she told a lie had a great influence on her ________.