Complete the sentences with the correct forms of the verbs given. 1. before we travelled to paris, we (research) all the best places to visit. 2. 'the potatoes are undercooked.' -- 'i (put) them back in the oven.' 3. i was about to go to bed when he (call) . 4. we (discuss) a surprise birthday party for jake when he went into the classroom, so we had to stop talking.

To complete the sentences with the correct forms of the verbs given: 1. Before we traveled to Paris, we **researched** all the best places to visit. Explanation: Past simple tense is used to show an action that was completed before another action in the past (traveling to Paris). 2. "The potatoes are undercooked." -- "I **will put** them back in the oven." Explanation: Future simple tense is used here for a decision made at the moment of speaking to fix the undercooked potatoes. 3. I was about to go to bed when he **called**. Explanation: Past simple tense is used to express that one action happened immediately after another action in the past. 4. We **were discussing** a surprise birthday party for Jake when he went into the classroom, so we had to stop talking. Explanation: Past continuous tense is used here to describe an interrupted action that was in progress when another action occurred (Jake entering the classroom).