---How long do you think it is ______he took up the job?--- Half a year at least.
We can surely overcome these difficulties _,___ we are closely united.
I firmly believe _____ he said at the meeting was right.
___ difficult the task may be, we must fulfil it this month.
“_____ when does the pub stay open?” “About midnight.”
___you understand this rule, you will have no further difficulty.