.I know everything goes smothly from his________voice on the phone.
-- Isn’t that Ann’s husband over there? -- No, it ________ be him. I’m sure he doesn’t wear glasses.
I didn’t believe the reasons he explained _____ me.
He is difficult ________.
The number of people present at the meeting_________about 1000 , a large number of whom _______ experts from abroad.
You can hardly imagine what great difficulty we had _________ the task.