30.The problem lies in ______ the mist may become a thick fog , making the situation even worse.
| A．that | B．which | C．what | D．that whether |
- The water was left running all night long.
- Yes. It seemed that John ___. He was the last one to leave the lab.
| A．was to be blamed | B．was to blame |
| C． had been blamed | D． should be blamed |
Only after a baby seal is pushed into the sea by its mother _______to swim.
| A． how will it learn | B．will it learn how |
| C． it will learn how | D．and it learns how |
______ by Ren Changxia's deeds, many young girls want to be a policewoman in the future.
| A．To be inspired | B．Having inspired | C．Being inspired | D．Inspired |
- What took you so long?
- I got lost. I have no _______of direction.
| A．sense | B．ability | C．knowledge | D．feeling |
We can never expect ________bluer sky unless we create _____less polluted world
| A．a;a | B．a ;the | C． the ;a | D．the; the |