___from the top of the tower,the south foot of the mountain is a sea of trees
| A．Seen |
| B．Seeing |
| C．Having seen |
| D．To see |
It is our duty to try to ______ production and reduce the number of things we make and buy.
| A．cut back on | B．put up with |
| C．hold on to | D．run out of |
Our factory has been developing rapidly this year. This year’s production is five times _____ it was ten years ago.
| A．that | B．what |
| C．which | D．as |
We should produce less things from raw materials, _____ is growing smaller and smaller.
| A．whose supplies | B．the supply of which |
| C．which supply | D．the supply of whom |
As fuel prices rose, bus companies raised their fares and _____.
| A．so did the airlines |
| B．nor did the airlines |
| C．so the airlines did |
| D．nor the airlines did |
Friendships between girls are usually ________ shared feelings and support, but friendships between boys are based on shared activities or interests.
| A．cautious about | B．absorbed in |
| C．anchored in | D．concerned about |