It was ________ she got home ________ she found her diamond necklace missing.
—He looks very happy. He ____have passed the exam, —I guess so. It’s not difficult after all.
Nowadays, most people,in order to keep fit,prefer walking to driving ____necessary.
Giving children pocket money as a gift during the Spring Festival is a common ____ in China.
_____with this challenge, he should meet it without any hesitation.
___in a heavy snow, the couple had to walk home, leaving their car behind.