单项选择题
A.helping B.to help C.helping to D.to help to
36()A.thatB.whichC.whatD.it
单项选择题36()
A.that B.which C.what D.it
44()A.in thatB.untilC.so thatD.since
单项选择题44()
A.in that B.until C.so that D.since
43()A.ensureB.protectC.undertakeD.promise
单项选择题43()
A.ensure B.protect C.undertake D.promise