A.as
B.so
C.so as to
D.so that

A.as
B.so as
C.as if
D.as though

A.in order that preparing everything on time
B.in order that being prepared on time
C.so that everything would be prepared on time
D.so as to being prepared on time

A.safety standards are maintained
B.so safety standards are maintained
C.to maintain safety standards
D.maintain safety standards

A.so that we can use them for a long time
B.in order to use them for a long time
C.to use them for a long time
D.all are correct

A.in order to
B.in order that
C.so as to
D.such that

A.to understand them clearly
B.so that his students could understand them clearly
C.in order to understand them clearly
D.so as his students understand them clearly

A.in order that
B.in order to
C.so as to
D.to

A.Whether she goes to college
B.Whether does she go to college
C.If does she go to college
D.That if she goes to college

A.what his team’s weaknesses are
B.his team’s weaknesses are
C.that his team’s weaknesses are
D.that are his team’s weaknesses