21－Is it OK to take this seat？ －Sorry. _______ A. here you are B. take it C. it’s taken D.

It takes small steps to create big change and this is（)service－learning hopes to ach

Which of the following statements is true about British pub etiquette？A.It is OK to star

As it is a very popular play, it would be wise to ___ seats in advance.A.buyB.preserveC.bo

How long do you think______to finish this urgent task？A．did it take youB．it will take youC

Jack is determined to get a seat for the concert______it means standing in a queue all nig

It is advisable that he ________ a seat in the train to Beijing.A may reserveB ought to