It is 4：30 pm． Ben and Leon _______ their work， so they are playing chess now．（ ）
A．finishB．finished
C．have finishedD．will finish
﹣Chinese players won the 54 World Table Tennis Championships in Germany．
﹣Yes． They by us Chinese． They're all our heroes．（ ）
A．were praisedB．will praise
C．have praisedD．may be praised
﹣Where is George？
﹣He be here just now． His coffee is still warm．（ ）
A．needB．can'tC．mustD．shouldn't
﹣More and more volunteers go to see the sick kids in the hospital to ．
﹣Wow， I'd like to join them．（ ）
A．wake them upB．cheer them up
C．wake up themD．cheer up them
﹣97.9FM plays music among the radio stations in our town．
﹣Yes． And the songs are always boring and too loud．（ ）
A．bestB．worstC．the bestD．the worst
﹣It is believed that a model plane of will be shown at the science fair next month．
﹣How about ？（ ）
A．Bob's； yourB．Bob； yours
C．Bob's； yoursD．Bob； your