When _____ the letter, tears came to her eyes.
Hurry up, or you ______ catch the train.
You can improve your English ______ practicing more.
—What’s wrong with you, Eric? You look tired.—I ______ to prepare for the final exam last night.
Tony is not as clever as Lucy, but he works ______ than her.
—Why are you excited today?—We have been told ______ a picnic this weekend.