How long did it take you _____ the classroom yesterday.
| A．to clean | B．clean | C．cleaning | D．Cleaned |
______ of the area _______ covered by trees.
A. Two-third; is B. Two thirds; is C. Two-third; are
Every year I have to visit my grandpa by train because he lives in a village _______.
A. too far B. far away from C. far away
In the past, most parents couldn’t _______ their children’s education.
A. cost B. take C. afford
– ______ the population of the world? – _______ about 6.5 billion.
A. How many; They’re
B. How much; It’s
C. What’s; It’s
– Are there ______ of students in your school?
– Oh, yes. There are about five ________.
A. thousand; thousand
B. thousands; thousand
C. thousand; thousands