--- Is this your backpack? ---________________.It’s my backpack.
| A．Yes，this is. | B．No， it is. |
| C．No，it isn’t. | D．Yes， it is. |
All the students in the classroom do their homework ______.
A. enough careful B. careful enough C. carefully enough
—Whose room is this? Is it the______?
—Yes, it is ______.
A. twins'; Tom and Tim's
B. twin's; Tom's and Tim's
C. twins'; Tom and Tim
—Many people talk about "Didi". I really wonder ______.
—You call to order a taxi through it on your mobile phone easily.
A. how can I use them
B. who uses them most
C. what they are used for
—How far is it from Beijing to Haikou?
—It's a______ flight from Beijing to Haikou.
A. 3-hour-long B. 3 hours long C. 3 hours' long
—Jim, how do your parents like country music?
—______ my dad ______ my mom likes it. They both like country music.
A. Either...or
B. Not only...but also
C. Neither...nor