Since nobody gave him any help,he ________ have done the research on his own.(2013·大纲全国,26)
“Mr Smith isn’t coming tonight.” “ But he _____.”
.“Your phone number again? I _____ quite catch it.” “It’s 4331577”
Dear me! Just _____ at the time! I _____ no idea it was so late.
The traffic accident wouldn’t have happened yesterday, but the driver _______ really careless.
I had expected to come over to see you last night, but someone ______ and I couldn’t get away.