【C20】A．agoB．pastC．aheadD．before

He（) himself on the back for he was the only one to pass the exam.A pattedB pastC passed

Time is . Ten years have passed in a wink.A、shortB、pastC、fleeting

【C20】______A．withB．offC．beforeD．from

【C5】A．behindB．backwardC．aheadD．forward

【C20】A．laterB．firstC．nowD．before

【C3】A．Not long agoB．ThenC．More recentlyD．Later