Look, Mr Green is on the other side of the street.— It _____ be him.He has gone to London on business.

How long have you learned English—So far, we ________ English for more than six years.

Though his grandfather was 60 years old, he____a trip around the world. [ ]

Many boys and girls are made____ what they’renot_____.

Jim, ___ read books while you are walking in the street. It’s very dangerous.