Everyone in my class _________ his lessons.
| A．enjoy listening to | B．enjoys listening to |
| C．enjoys listening | D．enjoy listening |
Its population is almost ________ of the world’s population.
| A．one two | B．two thirds | C．fifth three | D．one five |
At eight o’clock last night Alice _________ with her family happily in Hongkong.
| A．has dinner | B．had dinner |
| C．is going to have | D．was having dinner |
John does important research _______ the best ways to help the old.
| A．finds | B．finds | C．found | D．to find out |
Many wild animals don’t have a safe place to live, ___________people are taking away their land and forests.
| A．when | B．while | C．because | D．and |
We stayed there and watched the opera ______ an hour.
| A．in | B．for | C．at | D．on |