We finally managed to make the customers___of the quality of the vehicle.

Children must be _________ to serve（服务） their country when they grow up.

---____ is your nationality? ---My nationality is Chinese.

The quiet girl has ________ since she became a sales clerk.

-----These tomatoes are huge ! You must have watered them a lot . -----Yes,  I___. They ought to be piped enough to pick by next Friday