He sometimes      a picture, but now he     .

—Let's go fishing if it               this weekend.
—But nobody knows if it               .

—Peter said that he would come over to have dinner with you tonight.
—But I think he              . I have been alone for an hour.

–Where is Mr.Smith?
--He isn’t here. He ______ to England.

I don’t know when Kitty ___________ tomorrow, and please give this message to her when she _________________.

I ____you yesterday afternoon ,but you ____at home .

When the teacher ______ how to do the experiment, the bell rang.

I ______ my mind to study harder since I visited the Shanghai Supercomputer Centre.

There ______ a dolphin show in the zoo tomorrow evening.