Studying alone, you are free to choose what to learn and when, ________ you don’t need others’ agreement.
| A．while | B．if | C．though | D．as |
Tom owns ______larger collection of ______books than any other student in our class.
| A．the ,/ | B．a,/ | C．a ,the | D．/, the |
The Wilsons live in ______A-shaped house near the coast . It is _______17th century cottage.
| A．the, / | B．an, the | C．/, the | D．an ,a |
It is ___world of wonders, _____world where anything can happen.
| A．a. the | B．a, a | C．the, a | D．/,/ |
While he was investigating ways to improve the telescope Newton made _______discovery which completely changed ____ man’s understanding of color.
a ,/ B. a ,the C. /, theD. the ,a
The most important thing about cotton in history is ___part that it played in ____Industrial Revolution.
| A．/,/ | B．the,/ | C．the , the | D．a ,the |