Mary has changed a lot.–Yes.She _______short,but now she is very tall.

None of the underwater workers has been harmed by the great fish________, most fish were so friendly that they played with the instruments

I won’t tell thestudent the answer to the math problem until he onit for more than an hour

I was lucky to win a gold medal in the 800-meter-race. — You __________ through tough training.

Which is ___ country, Canada or Australia?