People develop ________ preference for a particular style of learning at ________ early age and these preferences affect learning.
| A．a；an | B．a；不填 | C．不填； the | D．the；an |
With our country entering an aging society, ______ the retirement age is probably unavoidable.
| A．having delayed | B．delaying | C．being delayed | D．to be delayed |
The new policy allows a couple to have a second birth _____either is an only child.
| A．though | B．if | C．unless | D．until |
Will was stupefied with exhaustion, and he _____ his head on the grass under one of the trees and slept, but he saw a cat acting strangely.
| A．should have lied | B．ought to have lay | C．might have laid | D．must have laid |
----He thinks that girls are smarter than boys when it comes to learning English.
----But two years ago he thought_______.
| A．so | B．otherwise | C．opposite | D．different |
Although her diseaseher eyesight and forced her to leave the dance floor, she refuses to fall into self-pity.
| A．has affected | B．affected | C．affects | D．had affected |