---Why are you busy these days?
-- I am writing a book.
| A．since | B．as | C．for | D．because |
Whatuseful book. Andbook is popular with students.
| A．a , a | B．an , a |
| C．the , the | D．a , the |
About of the students in our school were born in the.
| A．two-thirds, 1990 | B．two-thirds, 1990s |
| C．two-third, 1990 | D．two-hird, 1990s |
—What are you looking for？
—I’m looking for the bookI bought last week.
| A．which | B．whose |
| C．who | D．when |
—What about playing football this afternoon, Sam ?
—I would ratherat home thanfootball. It’s too hot outside.
| A．stay ; playing | B．stay ; play |
| C．to stay ; to play | D．to stay ; playing |
The street is covered with rubbish and .
| A．is smelt bad | B．smells badly |
| C．smells bad | D．is smelt badly |