1：He slipped into the room ,without himself ___.A：seen B：being seen C：seeing D ：to see 2：I think ____ necessary to learn

1：He slipped into the room ,without himself ___.A：seen B：being seen C：seeing D ：to see 2：I think ____ necessary to learn English well.A：its B：it C：that D：that is 3：When I came back.I found the house___ and everything ___.A：was broken ;took away B：broken into ；taken away C：had been broken ：taken D：break into ：take away 4：For a time his grandfather found _____ accept his new ideal A：hard B：it hard C：it hard to D：it is hard to 5：I cuoldn’t do my homework with all that noise.A：going on B：goes on C：went on D：to go on 6：When i put my hand on his chest ,I could feel his heart still___ A：beat B：to be beat C：beating D was beating 7：He managed to make himself ___ with his ____English A：understand；breaking B：understand； broken C：understood；breaking D：understood； broken