----Look at that model ship. ----I know,but it looks like a real one.It’s just _______.
Do you remember_____ yesterday?
Yuan Longping, a great person in China, _____as “father of hybrid rice”
______ the work is difficult, all the workers are keeping on working .
Tom often makes his brother____ but yesterday he was made____ by his brother.
---May we go home mow ?--- No, you____. You____ to go home until 5 o’clock.