Chọn đáp án đúng 1.lf l were at your age,l would.....everyday. A.go to bushwalk B.go bushwalking C.bushwalking D.go bushwalk 2.unless we...throwing garbage into the river,it will be polluted. A.stop B.don't stop C.will stop D.won't stop 3.lf you...more slowly,he would have understood you. A.spoke B.would speak C.speak D.had spoken 4.l...not miss any classes if he....you. A.would/was B.would/were C.will/is D.will/was 5.you won't be allowed to teach here...you show your qualification. A.since B.unless C.for D.if 6.lf tom ...an alarm ,the thieves wouldn't have broken into his house. A.to install B.had installed C.have installed D.was installed 7.the travels of marco polo in the 12th century...so well known if he hadn't written that book while in prison. A.must have been B.wouldn't have been C.won't have been D.could have been.