The moment ______Leo will never forget is ______he joined the Air Force
| A．when; that | B．that; that | C．that; when | D．when; / |
TheUnitedNations____in1945.
| A．werefound | B．werefounded | C．wasfounded | D．wasfound |
I,who _____yourgoodfriend,willshareyourjoysandsorrow.
| A．am | B．is | C．are | D．was |
Betweenthetwobuildings _____amonument.
| A．stand | B．stands | C．standing | D．isstanding |
Layingeggs____theantqueen’sfull-timejob.
| A．is | B．are | C．has | D．have |
Peter,perhapsJohn,____playingwiththelittledog.
| A．is | B．are | C．were | D．seems |