Paper produced every year is ________ the world’s production of vehicles.
| A．the three times weight of | B．three times as heavier as |
| C．as three times as heavier as | D．three times the weight of |
So necessary _____ it to learn about their customs that I will attend a special lecture next week.
| A．I have found | B．I feel | C．have I found | D．will I feel |
Your son came to my class every day, but his attitude _____ he was not really interested at all.
| A．expressed | B．suggested | C．explained | D．described |
It' s a pity that there are many teenagers _____only on-line activity is chatting with their e -pals !
| A．who | B．that | C．which | D．whose |
- Do you mind my opening the window?
-______I feel a bit cold.
| A． Of course not. | B． I would rather you didn' t. |
| C． Go ahead. | D．Why not? |
Father said he would come to my graduation ceremony, he didn't, _______.
| A．though | B．personally | C．indeed | D．anyway |