32A ( eaten ⇒ had eaten ; after + QKHT + QKĐ )

   33A ( did you do ⇒ were you doing ; at 9'clock last night là dấu hiệu câu QKTD )

   34D ( has already left ⇒ was leaving ; when + QKĐ + QKTD )

   35C ( during ⇒ since ; HTHT + since + QKĐ )

   36A ( has disappeared ⇒ disappeared ; ago là dấu hiệu của QKĐ )

   37D ( was cooking ⇒ cooked ; after + QKHT + QKĐ )

   38C ( saw ⇒ have seen ; It / This is the first time + HTHT )

   39B ( graduates ⇒ had graduated ; after + QKHT + QKĐ )

   40B ( had been ⇒ has been; Up to now, HTHT )

   41B ( It's + t/g + since + QKĐ ⇒ S + haven't/hasn't + V(PII) + for/since + t/g )

   42D ( The last time + QKĐ + was + t/g của quá khứ ⇒ S + haven't/hasn't + V(PII) + for/since + t/g với TH này thì dùng for vì là khoảng t/g)

   43C ( cấu trúc ngược lại so với câu trên )

   44C ( S + started/began + to V / Ving + ... + t/g trong quá khứ ⇒ S + have/has + V(PII)  + ... + for/since + t/g )

    45B ( cấu trúc giống câu 43 )