He has many books, are written in English.
| A．most of them | B．most of whom | C．most of which | D．most of those |
The size of Asia is ________ Europe.
| A．two times that of | B．two times larger than | C．twice larger than that of | D．twice larger of |
There were more than 1,400 occasions last year ________ access to humanitarian aid was denied in some conflict zones.
| A．of which | B．in which |
| C．on which | D．at which |
---You’ve made great progress in your studies of English, haven’t you?
--- Yes, but much________.
--- Yes, but much________.
| A．remains to do | B．is remained to do |
| C．is remained to be done | D．remains to be done |