4. Read the following sentences and choose the correct form of the verb to be: 1) English … the international language of business.

a) is b) be c) are

2) You … surprised to know that many people are bilingual or even trilingual.

a) were b) are c) will be

3) I … confident in my level of English.

a) am b) are c) is

4) They ... very friendly and polite people.

a) are b) am c) was

5) Peter … in Spain in 2015.

a) was b) will be c) were

6) While we ... travelling around Europe we met our neighbor.

a) are b) were c) will be