1.Many US automobiles.................in Detroit, Michigan A.manufacture           B.have manufactured           C.are manufactured          D.are manufacturing 2.A lot of pesticide residue can.............on unwashed produce A.find           B.found                  C.be finding                    D.be found 3.We..................by a loud noise during the night A.woke up             B.are woken up         C.were woken up     D.were waking up 4.Some film stars................difficult to work with A.are said be            B.are said to be                C.say to be             D.said to be