He would have played the piano for you but you _____ him.
A.hadn't asked
B.haven't asked
C.didn't ask
D.would not have asked
A.hadn't asked
B.haven't asked
C.didn't ask
D.would not have asked
A.must have received
B.must receive
C.would have received
D.would receive
A、has been
B、would have been
C、had been
D、was
A.Have; would have
B.Had, would have
C.Did; have
D.Has; could have
A、would have answered
B、should answer
C、answered
D、had answered
A.avoid
B.refuse
C.deny
D.ignore
A.would be
B.would have been
C.will be
D.was
A.would invite
B.would have been invited
C.would have invited
D.would be invited
A、mustn't attend
B、cannot have attended
C、having improved
D、would have not attended
A、would have been busy working
B、must be busy to work
C、must have been busy working
D、must be busy wording
These Fabricated Tree House Habitats would use trees grown into shapes as housing. One of the __2__ of these designs is that trees would not have to be cut down for lumber.
"A 100 percent treehouse would take years to create," Joachim said.__3__ the climate, a house could take anywhere from 5 to 30 years to grow. Fortunately, there's a way to speed up the process. Joachim suggests including ecological materials such as sod (草皮), grasses and living branches in the housing designs. "This material would be able to move as the house grows," Joachim said.
A home would become an actual ecosystem, a community of plants, animals, and bacteria working together. The trees would also give off water vapor that would assist in __4__ the homes. Solar panels and wind would help provide energy. The tree homes might even have soil pockets, where plants could grow from the structure itself.
Work has already begun on Joachim's first design—a house made from 50 percent recycled and 50 percent living things. Joachim is confident about the __5__ of his work, as he uses natural products without destroying nature.
"The environment and its study are very important. We need to respect nature, don't take it for granted," he said.
(1)A.effected
B.affected
C.attempted
(2)A.purposes
B.disadvantages
C.advantages
(3)A.Depending on
B.Judging by
C.Protected from
(4)A.cleaning
B.heating
C.cooling
(5)A.happiness
B.benefit
C.importance