Besides proper diet, exercise is one of the key ___________of a healthy lifestyle.
| A．components | B．categories | C．ranges | D．processes |
Hearing the news, he rushed out, ______ the book ______ on the table and disappeared into the distance.
| A．left; lain open | B．leaving; lie opened |
| C．leaving; lying open | D．left; lay opened |
Burglar alarms ________ at any time of the day or night serve only to annoy.
| A．go off | B．that are going of |
| C．that go off | D．which going off |
— Why do you look so worried?
—My computer broke down and my essay ______ unfinished since.
| A．had left | B．has left | C．has been left | D．was left |
Who will ______ your dog when you all go out for a holiday?
| A．keep down | B．look for | C．take to | D．attend to |
A man with a big camera in his hands stopped me and asked, “Excuse me! Is there a post office around ______ I can have these posters sent to my friends?”
| A．that | B．which | C．what | D．where |