单项选择题
A．watch lots of films B．buy an expensive camera C．stop in most cities D．take with him other machines apart from film
A．selfish B．patient C．tactful D．sympathetic
A．the star moved away from the sun B．another star happened to come near the sun C．fhe sun and the moon raised the tides on the earth D．a large tidal wave of a star travelled over the surface of the sun