“What are you doing , Amy” “I want to ________ these pictures on the wall.”

______ less homework, the students would have more time to play and have fun[ ]

In the north people sometimes tie straw ropes (草绳) round the trees in winter to ______ them from the cold.

“Could you please show me how to send an e-mail”he asked.→ show him how to send an e-mail.

Are you willing to live on Mars(火星)— ___________ It sounds exciting, but it still worries me.