`34.`B The last time I went to the supermarket was three weeks ago
`→`S + have/has not + Vpp + since/for + time
`=`The last time + S + V2/ed + was + time
`35.`A Mary spent two hours travelling to the countryside last week
`→`It took + O + time + to V
`=`S + spent + time + Ving : dành bao nhiêu thời gian làm việc nào đó
`36.`A Mary spent two hours travelling to the countryside last week
`→`It took + O + time + to V
`=`S + spent + time + Ving : dành bao nhiêu thời gian làm việc nào đó
`37.`A Bob told me he would help me
`→`Cấu trúc : S + told + O + to V
`-`Lùi thì : will `⇒`would