Tom came to work last Friday ,but no one has seen him since. —he have had an accident ?

for the fact that she got hit by a car and broke her leg on her way to school, she might have passed the exam.

You haven’t joined the Singing Club, have you—_____. I like singing, but I don’t have any time.

Some people ________cruel experiments on animals________science.

When did you first meet Tom?— On May 2, , the first day I came to this city[ ]