He insured his car ________ he had an accident.
A、unlessD
他给自己的汽车投了保，以防万一遇到交通事故。考查连词词义区分题。A否则，要不然B如果C自从，由于D以防万一，以免
Agoodworkerinakeyspotcould,so_______ashekeptupproduction,takeallthecoffeebreakshewanted.
Thereisanambiguityinthesentence“Heisahardbusinessman”dueto______.
Idiomsnominalinnaturehavea(n)______asthekeywordineachandfunctionasanouninsentences.
Wordsthatareidenticalonlyinspellingbutdifferentinsoundandmeaningarecalled______.
Policeare________thedisappearanceoftwochildren.
