单项选择题
A．am leaving B．will leave C．shall have left D．had left
Unluckily, when I arrived he, so we only had time for a...
单项选择题Unluckily, when I arrived he, so we only had time for a few words.（）
A．just left B．has just left C．had just left D．was just leaving
—How many guests are there in the room—15,（）two childre...
单项选择题—How many guests are there in the room—15,（）two children.
A．include B．including C．included D．is included
Li Lei didn't meet the famous American professor（）he wa...
单项选择题Li Lei didn't meet the famous American professor（）he was on holiday last year.
A．unless B．until C．if D．whether
