________ Pierre began to help his father with the farm work when he was
| A．In 1980’s; his teens | B．At the 1980’s; the teens |
| C．In the 1980s; in his teens | D．In 1980’s; in the teens |
______your opinions are worth considering,the president finds it unwise to place too much importance on them.
| A．As | B．Since | C．When | D．While |
_______ in the school rules that boy students should not wear long hair.
| A．What is required | B．What requires |
| C．It is required | D．It requires |
He transplanted the rare flowers to the botany garden_______it was the best time for them.
| A．where | B．when | C．until | D．that |
_______ much I dislike the idea of begging in the street,we should still show consideration for those who are in difficult situations.
| A．However | B．How |
| C．Whatever | D．No matter |
They are discussing in the next room_______will go to the conference on behalf of the manager.
| A．whoever | B．who | C．what | D．whomever |