I. Choose the correct item.
1 We … a 10% discount until the end of this month.
a) offer b) are offering
2 We … the Japanese trade fair this year.
a) will attend b) will be attending
3 A: What … when you heard the noise?
a) were doing b) did do
B: I … to change a carbon briquette cartridge.
a) was trying b) tried