What the science teacher does and says ____ of great importance to college students.
| A．was | B．are | C．is | D．were |
Chicago is on ________ Lake Michigan. There is nothing in the world like ________ Chicago meat industry.
| A．the；the | B．不填；不填 |
| C．the；不填 | D．不填；the |
Do you think the reason ________ he gave is believable?
| A．for which | B．which | C．why | D．what |
This is an illness that can result in total blindness ________ left untreated.
| A．after | B．if |
| C．since | D．unless |
Paper produced every year is ________ the world’s production of vehicles.
| A．the three times weight of | B．three times the weight of |
| C．as three times heavy as | D．three times as heavier as |
--You should have thanked her before you left.
---I meant _______. But when I was leaving I couldn’t find her anywhere.
| A．to do | B．to | C．doing | D．doing so |