---You’ve made great progress in your studies of English, haven't you?
---Yes, but much___.
| A．remains to do | B．is remained to do | C．remains to be done | D．is remained to be done |
In the USA, Columbus Day is_______ the _____ of Christopher Columbus in the New World.
| A．in the memory of; arrival | B．in memory of; arrival |
| C．in the memory of; arriving | D．in memory of; arriving |
Recent pressure at work may________ his behavior.
A. accounts for B. pay for C. stand for D leave for
The money is to be used ________the poor.
| A．for the benefit to | B．for the benefit of | C．for benefit of | D．to the benefit of |
There are________ products to be sold in the factory store. Which is not correct in the following?
| A．a large number of | B．quantities of | C．a large amount of | D．a great many |
—Mom，dad is smoking again!
—Well，let him cut it ________ gradually since old habits die hard.
| A．off | B．down | C．up | D．out |