1.B.protect
help do sth帮助做某事
2.A.cleaning
help sb with doing sth固定短语,帮助某人做某事.
3.B.finishing cleaning
介词后要用动名词,finish后也要用动名词
4.C.to stay
be to do 打算做.
1.B.protect
help do sth帮助做某事
2.A.cleaning
help sb with doing sth固定短语,帮助某人做某事.
3.B.finishing cleaning
介词后要用动名词,finish后也要用动名词
4.C.to stay
be to do 打算做.