—What’s the best way to reach you if I have a question during the day?—I'm glad you ________. It’s best if you send me an email.
A quarrel _________, which made him ______ his family.
Our class _______ of thirty-two boys and twenty-three girls.
Now a lot of new technologies can ______ problems in industry.
When I returned home ,I found the window _____and something____.
Come and see me whenever ____ .