21. a special purchase of toys on very favourable terms, we are able to offer them to you at the following attractive prices.
A.having done B.having been doing C.having made D.having been made
22.We can only this very advantageous offer for a few weeks.
A.hold open B.hold openly C.hold opening D.hold to open
23.The recent advance in the cost of raw materials us to make a slight increase in the prices.
A.are compelling B.has compelled C.is being compelled D.has been compelled
24.Although costs have been steadily since last October, we have not yet our prices.
A.raising risen B.risen raising C.rising raised D.raised rising
25. Supporting your sales, we are sending some samples of our new makes.
A.In order to B.with a view to C.intending to D.owing to