16. Did da Vinci _________to create such a dynamic effect in the Mona Lisa?

A. 　 Living in a “smart” city will be far from you.

B. 　 People live in a “smart” city.

C. 　 Buildings turn off the lights for you.

D. 　 Self-driving cars will find the nearest parking space themselves.

A. 　at school

B. 　at home

C. 　in the field

D. 　in the street

A. 　 Teenagers of 12 to 16 only need 4 to 7 hours’ sleep each day

B. 　 Few of the teenagers have electronic products in their bedrooms

C. 　 Teenagers spend too much time on electronic products

D. 　 Girls between 13 and 16 spend the least time on electronic products

A. 　 catches up with

B. 　 holds fast to

C. 　 catches in

D. 　 holds back

A. 　 chosen

B. 　 single out

C. 　 sing

D. sincere

A. 　 There are 20-25 students in the same class.

B. 　 They meet twice (两次) every week.

C. 　 We can find some teachers＇ pictures on the wall.

D. 　 Students can talk with English or American people there.

A. 　 travel; unless

B. 　 to not travel; if

C. 　 not to travel; unless

D. 　 not to travel; if

A. 　 beautifully

B. 　 more beautifully

C. 　 less beautifully

D. 　 most beautifully

A. 　 Because

B. 　 Although

C. 　 Unless

D. 　 Until

A. 　 not easy

B. 　 easy

C. 　 not difficult

D. 　 extremely easy