Question 17: The sensor light __________ on automatically saves electricity at night. A. which turns B. which...

Question 2: Many commuters try to __________ short car trips by using shared bikes for nearby errands.

A.  cut down on        

B.  look for        

C.  care for        

D.  give away

Question 3: New policies require __________ reports before companies build large warehouses near protected rivers in fast-growing regions.

A.  environments        

B.  environment        

C.  environmentally        

D.  environmental

Question 4: Festival visitors are encouraged to __________ their own bottles, which reduces queues at refill stations during hot afternoons.

A.  rinse        

B.  bring        

C.  throw        

D.  look

Question 5: Many shoppers are now aware __________ hidden packaging waste when buying small products online every week.

A.  from        

B.  with        

C.  of        

D.  to

Question 1: In the new library, a __________ turns on only when people pass the quiet shelves at night.

A.  compost pile        

B.  landfill        

C.  sensor light        

D.  leaflet