–Whose exam paper is it?–It be Li Lei’s. He always forgets to write his name on it.A. must B. should C. can’t
________it rains heavily,they go on working outside.
What________is the most helpful invention?
The dinner didn’t start________all the friends arrived.
He is________to lift the bag full of rice onto the truck.
—AU the villagers________the fight against the big flood,________young and old,men and women. —It’s really very brave of them to do so.