17. We really had a good time in Italy last week, and the flight was two hours late.
18. Where do they should visit for their next vacation? A. Where B. do they should C. for D. their
19.1. The weather was terrible, so we canceled our picnic. (BECAUSE)
→ We canceled our picnic because the weather was terrible.
19. We canceled our picnic because the weather was terrible. (so)
20. We didn’t go on a picnic because it was raining heavily. (so)
21. We stayed at home because the weather wasn’t good. (so)
22. The weather was bad, so we called off the picnic (because)
23. The weather turned bad, so we had to cancel our picnic. (because)
20.1. It’s not a good idea to go to the highland in the winter. (SHOULD)
→ We should not go to the highland in the winter.
21. It’s a good idea to take an umbrella when it rains. (SHOULD)
→ We …
22. It’s not a good idea to swim after eating. (SHOULD)
→ We …
23. It’s a good idea to wear a helmet when riding a motorbike. (SHOULD)
→ We …
17 and => but
18 B => should they
19 We canceled our picnic because the weather was terrible
20 It was raining heavily so we didn't go on a picnic
21 The weather wasn't good, so we stayed at home
22 Because the weather was bad, we called off the picnic
23 Because the weather turned bad, we had to cancel our picnic
20 We should not go to the highland in the winter
21 We should take an umbrella when it rains
25 We should swim after eating
26 We should wear a helmet when riding a motorbike
