Those who’d like to visit the exhibition ________ (sign) your names here.
sign
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________(fail)severaltimes,theyneedsomeencouragement.
Ishallneverforget________(meet)thelatePremierZhouduringhisinspectionofourfactory.
Iwishyou________likethat.
Somemoleculesarelargeenough________(see)undertheelectronicmicroscope.
Herefusedtotelluswhetherhe________(undertake)thejob.