Don’t________ too long, or you’ll be tired the next day.—OK, mum. I’ll be ready.

In our class some students are too shy to __________our hands when the teachers ask us to answer questions.

The hungry man eats his food _______he hadn ‘t eaten for a week.

h the help of our class, Little Mikemade such great progress in Chinese that he can write a 200-character ____

d for a seat, when he ______ have enteredfree.