1Iwaswalkingalongthestream,____ImetmyEnglishteacherandwetalkedforaboutanhourA:whenB:whileC:sinceD:once2Lookattheblankclouds.Itisgoingtorainsoon.ifonlewe_____out.A:did'tcomeB:shouldn'tcomeC:hadn'tcomeD:don'tcome

　　1Iwaswalkingalongthestream,____ImetmyEnglishteacherandwetalkedforaboutanhour

　　A:whenB:whileC:sinceD:once

　　2Lookattheblankclouds.Itisgoingtorainsoon.ifonlewe_____out.

　　A:did'tcomeB:shouldn'tcomeC:hadn'tcomeD:don'tcome

　　3IthoughtitmusthavebeenWilliamwhotookthedivtionarybymistake.

　　--_______,butheadmittedtakingitonpurpose.

　　A:soIdidB:sodidIC:somustheD:sohemust

　　4John,_______yourself,don'tmakeafoolofyouself.

　　A:behaveB:believeC:performD:conduct