These books are _____. _____ are in _____ bags.

The large grassland, reaching out far away, looks extremely beautiful ____the blue and clean sky

With a label ________ to each luggage，it is easy for passengers to recognize their own luggage[ ]

. Will you see to _______ that the luggageis brought back as soon as possible

Do you like communicating with your friends on QQ or MSN—____. I’d rather ____ the mobile phone.