according to our(),the books should now be returned to the library a.record b.recorded 填哪个there are many()classes and night classes a.train b.training 填哪个请解释

问题描述:

according to our(),the books should now be returned to the library a.record b.recorded 填哪个
there are many()classes and night classes a.train b.training 填哪个请解释

a.record 作介词宾语,用名词
b.training 作定语,用形容词