The fact has worried many scientists _____ the earth is becoming warmer and warmer these years.
| A．which | B．that | C．as | D．what |
Please let me know __________ you want to go or not.
| A．when | B．that | C．how | D．whether |
It took __________ building supplies to construct these energy-saving houses. It took brains, too.
| A．other than | B．more than |
| C．rather than | D．less than |
__________ is a good chance that I'll finish the work tomorrow.
| A．It | B．There | C．This | D．That |
Why are you in such __________ hurry? As __________ matter of fact, I will take __________ same flight as you.
| A．a; the; the | B．a; a; the |
| C．不填; the; a | D．a; 不填; a |
Will you __________ my composition to find out whether I've made any spelling mistakes?
| A．look through | B．look on |
| C．look up | D．look out of |