4. Write the appropriate form. 1. The custom office asked me to
my suitcase and started examining it. PACK
2. Our planet need
PROTECT
3. Lets go to the concert. It will be a
show.
WONDER
4. I have been to many countries.
is my hobby.
TRAVEL
5. Put the words in order to make the sentences. Write them down.
1. if/ scientist/ al you/ werel machine/ would you/a/ new/you/ invent
2. at/ who/ did/ the/you/ meet/ airport?​

1. The custom office asked me to PACK my suitcase and started examining it.
Explanation: In this sentence, the appropriate form of the verb "PACK" should be used. The correct form is "to pack", which means to put things into a suitcase or bag.
Solution: The custom office asked me to pack my suitcase and started examining it.

2. Our planet needs TO BE PROTECTED.
Explanation: In this sentence, the verb "need" should be followed by the infinitive form of the verb "protect". The correct form is "to be protected", which means that the planet requires protection.
Solution: Our planet needs to be protected.

3. Let's go to the concert. It will be a WONDERFUL show.
Explanation: In this sentence, the appropriate form of the adjective "wonderful" should be used. The correct form is "a wonderful", which means something that is excellent or extremely enjoyable.
Solution: Let's go to the concert. It will be a wonderful show.

4. I have been to many countries. TRAVELING is my hobby.
Explanation: In this sentence, the appropriate form of the noun "travel" should be used. The correct form is "traveling", which is the gerund form of the verb and describes the action of traveling.
Solution: I have been to many countries. Traveling is my hobby.

5. Put the words in order to make the sentences. Write them down.
1. If you were a scientist, would you invent a new machine?
Explanation: In this sentence, the words need to be rearranged to form a grammatically correct sentence. The correct order is as follows: If you were a scientist, would you invent a new machine?

2. Who did you meet at the airport?
Explanation: In this sentence, the words are already in the correct order to form a question. The correct sentence is: Who did you meet at the airport?